1. Copyright © Ed2Net Learning, Inc.1 Multiplying with 3 factors Grade 3

2. Copyright © Ed2Net Learning, Inc.2 Hello! How are you? we are going to begin another Lesson on Multiplication.

3. Copyright © Ed2Net Learning, Inc. 3 Multiply by 3 factors Three factors can also be multiplied to find the product. Example: 2 x 5 x 3 = 30

4. Copyright © Ed2Net Learning, Inc. 4 Associative Property of multiplication When multiplying, the grouping of the factors does not change the product. Example: ( 1 x 2) x 3 = 1 x ( 2 x 3)

5. Copyright © Ed2Net Learning, Inc. 5 To find product of 3 numbers To find product of 6 x 1 x 3, group the numbers first. (6 x 1) x 3 or 6 x (1 x 3) Then product can be calculated. Thus 6 x (1x 3) = 18

6. Copyright © Ed2Net Learning, Inc. 6 Use of commutative property and Associative property in finding product of 3 numbers. Commutative Property and Associative Property helps to change the order and grouping of the number to make it easier to multiply.

7. Copyright © Ed2Net Learning, Inc. 7 Different ways of multiplying 3 factors Using models of array Making a Table of equation Using multiplication properties

8. Copyright © Ed2Net Learning, Inc. 8 Group the numbers 3, 5, 1 in different ways to find their product. Answer- 3 x ( 5 x 1) (3 x 1) x 5 (1 x 5) x 3 5 x ( 1 x 3)

9. Copyright © Ed2Net Learning, Inc. 9 Michael spends $2 every 4 days in a week for 3 weeks on food. How much did he spend on food. Write the equation to find the total amount. Number of weeks x Amount spend each day x number of days = Total amount (2 x 4) x 3 = 24 He spends $24 in all.

10. Copyright © Ed2Net Learning, Inc. 10 Mr. Mock gives 2 nickels to each of his 4 children. How many pennies did he give away?

11. Copyright © Ed2Net Learning, Inc. 11 Find the product a) 2 x (3 x 3) b) (5 x 1) x 6

12. Copyright © Ed2Net Learning, Inc. 12 Find the missing number to make the make the sentence true. 5 x (1 x 3) = ( -- x 1) x 3. Which property of multiplication is used above?

13. Copyright © Ed2Net Learning, Inc. 13 The zoo tours has 2 zoo mobiles. Each zoo mobiles has 5 rows of seats. Each row has 4 seats. How many seats are there in 2 zoo mobiles?

14. Copyright © Ed2Net Learning, Inc. 14 Enjoy a Quick Break!

15. Copyright © Ed2Net Learning, Inc. 15 Try Assessment Questions Now.

16. Copyright © Ed2Net Learning, Inc. 16 1. There are 2 daisies. There are 2 times as many tulips as daisies and 3 times as roses as daisies. How many flowers are there?

17. Copyright © Ed2Net Learning, Inc. 17 2. Mrs. will baby sits 1 hours a day, 5 days a week. If she earns $5 an hour, how much does she earn in a week?

18. Copyright © Ed2Net Learning, Inc. 18 3. A bus has 2 sections of seats. Each section has 4 rows of 7 seats. How many seats are there in all?

19. Copyright © Ed2Net Learning, Inc. 19 4. An album has 6 pages with 2 photos on each page. Each photo shows 3 friends. How many friends are pictured?

20. Copyright © Ed2Net Learning, Inc. 20 5. A small plane has 3 rows of 5 seats. Each seat has room for 2 bags under it. How many bags will fit under the seats in all?

21. Copyright © Ed2Net Learning, Inc. 21 6. Find each product a) 5 x 1 x 2 b) (2 x 4) x 3

22. Copyright © Ed2Net Learning, Inc. 22 7. Jennie places 4 pieces of apple on each of 1 bowl on each table. There are 9 tables. How many pieces of apples are there in all?

23. Copyright © Ed2Net Learning, Inc. 23 8. A parking lot charges $5 per car. There are 7 parking spaces in each row. If 1 row of spaces is full, how much money will the parking lot attendants collect? Write multiplication sentence also.

24. Copyright © Ed2Net Learning, Inc. 24 9. For 2 weeks, Ms. Gomez spends $3 each day on a bus fare. How much does she spend on a bus fare in all?

25. Copyright © Ed2Net Learning, Inc. 25 10. Is 3 x ( 2 x 4) = (3 x 2 ) x 4. Which property of multiplication is used above?

26. Copyright © Ed2Net Learning, Inc. 26 Recap Multiply by 3 factors Associative Property of multiplication Use of commutative and Associative Property Solved examples Practice problems

27. Copyright © Ed2Net Learning, Inc. 27 Well Done! Now practice worksheets on Multiplying with 3 factors.