my homework lesson 2 multiplication as repeated addition

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McGraw Hill My Math Grade 3 Chapter 4 Lesson 2 Answer Key Multiplication as Repeated Addition

All the solutions provided in McGraw Hill Math Grade 3 Answer Key PDF Chapter 4 Lesson 2 Multiplication as Repeated Addition  will give you a clear idea of the concepts.

McGraw-Hill My Math Grade 3 Answer Key Chapter 4 Lesson 2 Multiplication as Repeated Addition

Math in My World

Example 1 Gilberto made 4 small pizzas for his party. Each pizza had 5 slices of tomato. How many slices of tomato did Gilberto use to make 4 small pizzas? Find how many slices of tomato there are in 4 groups of 5. One Way Draw a picture. 1. There are ____ groups. Draw 4 pizzas. 2. There are ____ in each group. Draw 5 slices of tomato on each pizza. 3. Count. There are slices of tomato.

Explanation: Gilberto made 4 small pizzas for his party Each pizza had 5 slices of tomato There are 4 groups I drew 4 pizzas There are 5 in each group. I drew 5 slices of tomato on each pizza I counted by 1’s there are 20 slices of tomato.

Another Way Use repeated addition The addition sentence to show the equal groups 5 + 5 + 5 + 5 = 20 So, 4 groups of 5 is 20 Gilberto used 20 slices of tomato.

When you find the total of equal groups of objects, you multiply. The symbol (×) means to multiply. The numbers multiplied are factors. The result is the product.

Explanation: I drew five 6-sided pattern blocks I wrote an addition sentence 6 + 6 + 6 + 6 + 6 = 30 So, 5 groups of 6 is 30 The total number of sides is 30.

Another way: Use multiplication sentence Number of groups are 5 Number of sides are 6 5 x 6 = 30 So, 5 groups of 6 is 30. The unknown is 30 sides.

Guided Practice

Explanation: There are 4 groups of 3 ants 4 groups of 3 Use repeated addition An addition sentence to show the equal groups 3 + 3 + 3 + 3 = 12 Use multiplication The multiplication sentence is 4 x 3 = 12.

Independent Practice

Write an addition sentence and a multiplication sentence for each.

Explanation: There are 3 groups of 2 butterflies 3 groups of 2 Use repeated addition An addition sentence to show the equal groups 2 + 2 + 2 = 6 Use multiplication The multiplication sentence is 3 x 2 = 6.

Explanation: There are 2 groups of 4 planes 2 groups of 4 Use repeated addition An addition sentence to show the equal groups 4 + 4 = 8 Use multiplication The multiplication sentence is 2 x 4 = 8.

Explanation: There are 6 groups of 3 balls 6 groups of 3 Use repeated addition An addition sentence to show the equal groups 3 + 3 + 3 + 3 + 3 + 3 = 18 Use multiplication The multiplication sentence is 6 x 3 = 18.

Explanation: There are 8 groups of 2 cockroaches 8 groups of 2 Use repeated addition An addition sentence to show the equal groups 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 = 16 Use multiplication The multiplication sentence is 8 x 2 = 16.

Draw a picture to find the total. Write a multiplication sentence.

Explanation: I drew 6 groups of 5 counters in each group 6 groups of 5 The multiplication sentence is 6 x 5 = Use repeated addition 5 + 5 + 5 + 5 + 5 + 5 = 30 So, 6 x 5 = 30 Therefore, 6 groups of 5 is 30.

Explanation: I drew 8 groups of 4 counters in each group 8 groups of 4 The multiplication sentence is 8 x 4 = 32 Use repeated addition 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 = 32 So, 8 x 4 = 32 Therefore, 8 groups of 4 is 32.

Algebra Multiply to find the unknown product.

Explanation: 3 x 5 = Use repeated addition 5 + 5 + 5 = 15 So, 3 x 5 = 15 Therefore, the unknown number is 15.

Explanation: 5 x 2 = Use repeated addition 2 + 2 + 2 + 2+ 2 = 10 So, 5 x 2 = 10 Therefore, the unknown number is 10.

Explanation: 3 x 3 = Use repeated addition 3 + 3 + 3 = 9 So, 3 x 3 = 9 Therefore, the unknown number is 9.

Problem Solving

Algebra Write a multiplication sentence with a symbol for the unknown. Then solve.

Explanation: 3 x 8 = Use repeated addition 8 + 8 + 8 = 24 So, 3 x 8 = 24 Therefore, the number of colors is 24.

Question 12. Three boys each have 5 balloons. How many balloons do they have altogether? ____ × ___ = ____ ____ × ____ = _____ balloons Answer: 3 x 5 = 15

Explanation: 3 x 5 = Use repeated addition 5 + 5 + 5 = 15 So, 3 x 5 = 15 Therefore, they have altogether 15 balloons.

HOT problems

Explanation: 5 groups of 6 5 x 6 = Use repeated addition 6 + 6 + 6 + 6 + 6 = 30 So, 5 x 6 = 30 is the multiplication sentence that tells the total.

Question 14. Mathematical PRACTICE 2 Use Number Sense What is 2 more than 5 groups of 3? _____ Answer: 2 more than 5 groups of 3 is 17

Explanation: 5 groups of 3 5 x 3 = Use repeated addition 3 + 3 + 3 + 3 + 3 = 15 So, 5 groups of 3 is 15 Add 2 to 15 15 + 2 = 17 So, 2 more than 5 groups of 3 is 17.

Question 15. ? Building on the Essential Question How are multiplication and repeated addition alike? Answer: Multiplication is nothing but the repeated process of addition. We can express the multiplication as the repeated addition of the same number. It is one of the arithmetic operations. The symbol of multiplication is “x”. Multiplying a 1-Digit Number means multiplying one-digit number by another one-digit number.

McGraw Hill My Math Grade 3 Chapter 4 Lesson 2 My Homework Answer Key

Explanation: 5 groups of 6 Use Repeated addition 6 + 6 + 6 + 6 + 6 = 30 Use multiplication 5 x 6 = 30 So, 6 + 6 + 6 + 6 + 6 = 30 5 x 6 = 30.

Explanation:

Explanation: 4 groups of 5 Use Repeated addition 5 + 5 + 5 + 5 = 20 Use multiplication 4 x 5 = 20 So,  5 + 5 + 5 + 5 = 20 4 x 5 = 20.

Explanation: 9 groups of 2 square crackers 9 x 2 = Use repeated addition 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 = 18 9 x 2 = 18 So, the total is 18.

Explanation: Leonora has 4 bags of buttons Each bag has 10 buttons 4 x 10 = Use repeated addition 10 + 10 + 10 + 10 = 40 So, 4 x 10 = 40 Therefore, Leonora has 40 buttons altogether.

Multiply to find the unknown product.

Explanation: 3 x 8 = Use repeated addition 8 + 8 + 8 = 24 So, 3 x 8 = 24 Therefore, the unknown number  is 24.

Explanation: 4 x 3 = Use repeated addition 4 + 4 + 4 = 12 So, 4 x 3 = 12 Therefore, the unknown number is  12.

Vocabulary Check

Use the correct word(s) and the number sentence 6 × 8 = 48 to solve.

equal groups repeated addition multiply factors product

Question 8. The number 48 is the ______ Answer: The number 48 is the product.

Question 9. The symbol × tells you to ____ Answer: The symbol × tells you to multiply.

Question 10. The numbers 6 and 8 are the ____ Answer: The numbers 6 and 8 are the factors.

Question 11. 8 + 8 + 8 + 8 + 8 + 8 = 48 shows _____ Answer: 8 + 8 + 8 + 8 + 8 + 8 = 48 shows repeated addition.

Question 12. 6 × 8 means 6 _____ of 8. Answer: 6 × 8 means 6 equal groups of 8.

Test Practice

Question 13. Sam is washing windows. There are 5 windows in each of 7 rooms. How many windows does Sam have to wash? A. 2 windows B. 12 windows C. 30 windows D. 35 windows Answer: D. 35 windows

Explanation: Sam is washing windows There are 5 windows in each of 7 rooms 7 groups of 5 Use repeated addition An addition sentence to show the equal groups 5 + 5 + 5 + 5 + 5 + 5 + 5 = 35 Use multiplication The multiplication sentence is 7 x 5 = 35 So, Sam have to wash 35 windows.

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Lesson 2 Multiplication as Repeated Addition

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Multiplication as repeated addition

Common Core Standards: Grade 2 Operations & Algebraic Thinking

CCSS.Math.Content.2.OA.C.4

This worksheet originally published in Math Made Easy for 2nd Grade by © Dorling Kindersley Limited .

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Multiplication as Repeated Addition

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Second Grade Math Made Easy

These workbooks have been compiled and tested by a team of math experts to increase your child's confidence, enjoyment, and success at school. Second Grade Math Made Easy provides practice at all the major topics for Grade 2 with emphasis on addition and subtraction of larger numbers. It includes a review of Grade 1 topics, a preview of topics in Grade 3, and Times Tables practice. Learn how the workbook correlates to the Common Core State Standards for mathematics.

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Multiplication as Repeated Addition

• Each flamingo has 2 legs.
• The multiplication sign ‘×’ can mean ‘lots of’
• We can write ‘1 lot of 2’ as ‘1 × 2’.
• We can write 2 + 2 as ‘2 × 2’. This is 2 lots of 2.
• We can write 2 + 2 + 2 as ‘3 × 2’. This is 3 lots of 2.
• We can write 2 + 2 + 2 + 2 as ‘4 × 2’. This is 4 lots of 2.

• Each bicycle has 2 wheels.
• Here are 4 bicycles.
• To find the total number of wheels, we add them.
• We have 4 lots of 2.
• The multiplication sign ‘×’, means ‘lots of’.
• 4 ‘lots of’ 2 can be written as 4 × 2.
• We know that 4 × 2 = 8 from our times tables.

• Multiplication as Equal Groups
• Interactive Timed Times Table Grid

Multiplication as Repeated Addition Worksheets and Answers

What is Multiplication as Repeated Addition?

• 1 lot of 2 can be written as 1 × 2.
• 2 lots of 2 can be written as 2 × 2. As repeated addition it means 2 + 2.
• 3 lots of 2 can be written as 3 × 2. As repeated addition it means 2 + 2 + 2.
• 4 lots of 2 can be written as 4 × 2. As repeated addition it means 2 + 2 + 2 + 2.

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Engaging Ideas for Teaching Multiplication with Repeated Addition

If you’ve ever watched any of my Facebook Live videos or follow me on social media, you know that I am a HUGE fan of anchor charts! I always introduce a new concept by creating one whole group together. I then have students also create a mini one in their math journals so that they always have it to reference. This is especially helpful for multiplication with repeated addition and arrays lessons!

Typically, second grade teachers introduce multiplication with repeated addition and arrays towards the end of the school year. It’s that time of year where teachers have to pull out all the tricks to keep students engaged. Today, I’m going to share some simple ideas for teaching multiplication with repeated addition and arrays.

1. G.E.T. Strategy

Before diving into arrays, I recommend teaching students how to create and identify equal groups. The G.E.T strategy is my favorite way to introduce beginning multiplication strategies to my second grade students. G.E.T stands for groups x each = total. 

Here is how it works: 

Step 1:   Draw their “groups” which is always the FIRST factor in the problem. I always have them draw circles because it’s the easiest.

Step 2 : Next, they draw the “each” which is the SECOND factor in the problem. I have them draw dots. They like that it looks like cookies and it helps them relate.

Step 3 : Last, they write their total number. 4 groups of 5 = 20. They write their total to fill in the problem 4 x 5 = 20.

You can read more about this activity and grab this FREE multiplication mat at Introducing Multiplication To Primary Learners!

2. Playdough Equal Groups

Who doesn’t love playdough?!? Playdough = instant engagement no matter the age!

For this Playdough Multiplication with Repeated Addition activity, each student will receive a can of playdough (or 2 kids can share one can). They will also need a pencil to create dots on their playdough. The playdough will be used to create equal groups and then use the end of their pencil to create how many are in each group.

For example 4 groups of 2. They’ll create 4 playdough balls and then flatten them out. Then they will add 2 dots with their pencil to each group. After they’ve created their visual, they’ll write a repeated addition sentenced to match. 

3. Use Food as Manipulatives

Who doesn’t love learning with snacks? Anytime I ever busted out a bag of fruit loops or skittles, my class instantly became excited. You can step up your multiplication with repeated addition lessons by having students create equal groups using:

• M&M’s
• Fruit Loops
• Cheez-It Crackers

On their desks or white board, have them draw their circles to create their groups. Then use their food manipulatives to show how many are in each group. 

You can also use food to create arrays using columns and rows. You can grab this activity inside of my Multiplication & Division Unit !

4. Columns and Rows

Arrays bring multiplication lessons to a whole other level because columns and rows are involved. We have to constantly remind students that columns are vertical (up and down) and that rows are horizontal (go across). 

Help them distinguish the difference between columns and rows with this cross poster. It’s the perfect visual for reference throughout the year. I have them create a mini one in their math journal too. 

You can grab this columns and rows poster in my free resource library. Simply enter your email address below and instructions will be sent straight to your inbox. I do recommend using your personal email address. Sometimes these types of emails get blocked by school spam filters. 

5. Dab an Array with Bingo Daubers

This fun bingo dauber activity is part of my Multiplication and Division Guided Math Unit. Students use dice to determine the numbers used to create their array. Then, using their dauber, they write the matching repeated addition sentence and multiplication sentence. 

6. Stencil Arrays

I got this idea from my daughter’s stencil set. This set is great for both boys and girls because there is everything from princesses to dinosaurs to emojis! You can easily differentiate your multiplication with repeated addition lessons using arrays with these stencils.

Have students roll 2 dice and then create an array based off the numbers they roll. Create the arrays in their math journals and then ask students to write an addition sentence underneath. You can even take it one step further and have your learners write a word problem to match!

Check out my Facebook LIVE video where I show you how you can do this fun and engaging activity for addition & subtraction, as well! You can even create an array mural for an end of the year spiral review activity!

7. Sticker Arrays

In their math journal or using this Sticker Array Activity , have them create an array using stickers. Then they can create a word problem underneath that matches the array they created. 

For more multiplication ideas, you can check out my Multiplication and Division Unit . It features 10 days worth of done for you lesson plans filled with activities and games to be used as a guide. These plans follow a guided math format that include a warm up, mini whole group lesson, independent practice, and small group ideas for you to use in your classroom.

I hope that you find these activities helpful as you continue teaching multiplication with repeated addition to your learners!

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Multiplication as repeated addition (2nd grade math)

We take a look at the connection between multiplication and addition. Multiplication has to do with groups of the same size... and we can solve multiplication problems with repeated addition.

At first, the lesson uses visuals, but towards the end of the lesson, I encourage children to solve simple multiplication problems in their head by THINKING of addition (e.g. 3 × 5 or 4 × 100).

If you cannot see the video above, click here for an alternative video player.

Mental addition — add a 2-digit and a 1-digit number (with regrouping)

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Free Printable Multiplication and Repeated Addition Worksheets for 2nd Grade

Multiplication and Repeated Addition worksheets for Grade 2 students: Discover a variety of free printable resources to help teachers effectively teach math concepts and enhance students' learning experience.

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Multiplication and Repeated Addition worksheets for Grade 2 are essential tools for teachers to help their students build a strong foundation in math. These worksheets focus on teaching multiplication strategies that are easy for young learners to grasp, such as using arrays, skip counting, and number lines. By incorporating these techniques into their lesson plans, teachers can ensure that their students develop a deep understanding of multiplication and its relationship to repeated addition. Furthermore, these worksheets provide ample practice opportunities for students to apply their newfound knowledge, reinforcing their skills and boosting their confidence in tackling more complex math problems. As a result, Grade 2 students will be better equipped to excel in their math journey, thanks to the effective use of Multiplication and Repeated Addition worksheets.

Quizizz is an excellent platform for teachers to find a wide range of Multiplication and Repeated Addition worksheets for Grade 2, as well as other valuable resources to enhance their math curriculum. This interactive platform offers engaging quizzes, games, and activities that can be easily integrated into lesson plans, making learning fun and effective for students. Teachers can also customize the content to suit their students' needs, ensuring that they are challenged and motivated to improve their math skills. In addition to multiplication strategies, Quizizz provides resources covering various math topics, such as addition, subtraction, fractions, and more, catering to the diverse needs of Grade 2 students. By incorporating Quizizz into their teaching arsenal, educators can create a dynamic and interactive learning environment that fosters a love for math and sets their students up for success.

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Multiplication As Repeated Addition

In this understanding multiplication as repeated addition instructional activity, students convert repeated addition facts to multiplication facts and find the products. Students solve 30 problems.

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