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Operations and Algebraic Thinking
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Name
Lesson 4
Arrays and Multiplication
Practice
Write an addition sentence and a multiplication sentence to show equal rows.
1. 2.
+ + = + + =
× = × =
Homework Helper
The pumpkins in a patch are arranged in rows with an equal number in each row. How many pumpkins are in the patch?
Write an addition sentence and a multiplication sentence to show equal rows.
6 + 6 + 6 = 18 3 × 6 = 18
The Commutative Property of Multiplication allows you to change
the order of the factors to write another multiplication sentence, 6 × 3 = 18.
There are 18 pumpkins in the pumpkin patch.
4 4 4 12 5 5 5
3 4 12 3 5 15
15
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Use the Commutative Property of Multiplication to find each missing number.
3. 3 × 2 = 6 × 3 = 6 4. 6 × 4 = 24 4 × = 24
5. 8 × 6 = 48 6 × 8 = 6. 5 × 2 = 10 × 5 = 10
Problem Solving
Draw an array to solve. Then write two multiplication sentences.
7. Bottles of syrup are arranged in 4 rows of 7 bottles each. How many bottles of syrup are there in all?
9. How can you use an array to show the Commutative Property?
Vocabulary CheckVocab
8. A parking lot has 6 rows of 10 spaces. How many parking spaces are there altogether?
Test Practice 10. Which pair of number sentences represents the
Commutative Property of Multiplication?
A 3 × 6 = 18; 2 × 9 = 18 C 4 × 5 = 20; 8 × 5 = 40
B 6 × 7 = 42; 7 × 6 = 42 D 9 + 11 = 20; 11 + 9 = 20
6 × 10 = 60 parking spaces
10 × 6 = 60 parking spaces
Sample answer: Multiply the number of rows by the number of
columns. Then turn the array. The product is the same.
Sample arrays shown.
2
48 2
6
4 × 7 = 28 bottles
7 × 4 = 28 bottles
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Vendor: Quad Graphics Grade: 3
216�Need more practice? Download Extra Practice at connectED.mcgraw-hill.com
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