Page 195 - NUMINO TG_3A

Activity 1 Commutative Property of Multiplication

jOb ective Understand the concept of Commutative Property of Multiplication.

1. Textbook Instructions Activity 1 Commutative Property of Multiplication

Have students understand about 1 . An array is a set of objects or symbols in rows and columns. Write the
Commutative Property of Multiplication.
multiplication sentence to find the number of marbles using arrays.
1. Have students use arrays to solve the
problems. a. 2 rows of 4 b. 4 rows of 2
How many groups of circles are in the
array for a.? Two groups of four. 2 48 4 28
Write this as a multiplication sentence. c. 3 rows of 5
2 4 8. d. 5 rows of 3
How many groups of circles are in the
array for b.? Four groups of two. 3 5 15 5 3 15
Write this as a multiplication sentence.
4 2 8. e. 4 rows of 6 f. 6 rows of 4
Are the products for 2 4 and 4 2 equal
or different? The products are equal.
What stayed the same in the two
multiplication sentences? The product
stayed the same.
Find out if this is the same for all of the
problems.

4 6 24 6 4 24

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2. Build Understanding

Arrays and Commutative Property of Multiplication
Using arrays is a good way to help students better understand the difficult concept of Commutative
Property of Multiplication. It is a better way to explain the concept than trying to explain it in words.

178 NUMINO Teacher s Guide