Operations and Algebraic Thinking 3.OA.1, 3.OA.3, 3.OA.4, 3.OA.5, 3.OA.7, 3.OA.9 Copyright © The McGraw-Hill Companies, Inc. Need help? connectED.mcgraw-hill.com Name Lesson 2 Multiply by 7 Practice Algebra Find each unknown. Decompose the factor 7 into 5 + 2. 1. 7 × 10 = 2. 5 × 7 = Known facts: 5 × 10 = 2 × 10 = The unknown is . Known facts: 5 × 5 = 5 × 2 = The unknown is . Homework Helper Jared will go on vacation for 8 weeks this summer. For how many days will he be on vacation? Find 8 × 7. Decompose the factor 7 into the addends 5 + 2. 8 5 7 2 8 × 7 = 8 × 5 + 8 × 2 Multiply. = 40 + 16 Add. = 56 8 × 7 Lesson 2 My Homework439 r r r r eHelp
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Operations and Algebraic Thinking
3.OA.1, 3.OA.3, 3.OA.4, 3.OA.5, 3.OA.7, 3.OA.9
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© T
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Need help? connectED.mcgraw-hill.com
Name
Lesson 2Multiply by 7
PracticeAlgebra Find each unknown. Decompose the factor 7 into 5 + 2.
1. 7 ! 10 = " 2. 5 ! 7 = "
Known facts: 5 ! 10 =
2 ! 10 =
The unknown is .
Known facts: 5 ! 5 =
5 ! 2 =
The unknown is .
Homework Helper Jared will go on vacation for 8 weeks this summer. For how many days will he be on vacation?
Find 8 ! 7.
Decompose the factor 7 into the addends 5 + 2.
8
5
7
2
8 ! 7 = 8 ! 5 + 8 ! 2 Multiply.
= 40 + 16 Add.
= 56
8
### ! 7
!" #"$" %&
&" !&
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Vendor: Quad Graphics Grade: 3
Lesson 2!My Homework!439
rrrreHelp
0439_0440_Gr3_S_C08L2HW_115022.indd 4390439_0440_Gr3_S_C08L2HW_115022.indd 439 5/19/11 6:07 PM5/19/11 6:07 PM
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Problem SolvingAlgebra Write a multiplication sentence with a symbol for the unknown. Then solve.
7. 4 Model Math It takes Callie 9 minutes to paint each slat on a fence. There are 7 slats in each section of the fence. How long will it take Callie to paint each section of the fence?
8. Each house on Mulberry Street has 7 front windows. There are 3 houses on each side of the street. How many front windows are there in all?
Algebra Find each unknown. Use the Commutative Property.
3. 7 ! 3 = "
3 ! 7 = "
The unknown is .
4. 7 ! " = 28
" ! 7 = 28
The unknown is .
5. " ! 7 = 49
7 ! " = 49
The unknown is .
6. 7 ! " = 14
" ! 7 = 14
The unknown is .
Test Practice 9. A bicycle shop is replacing both tires on 7 bikes. How many
tires will be replaced altogether?
A 2 tires C 9 tires
B 7 tires D 14 tires
!"
# !
$
% ! # = "&; '( minutes
' ! # = "&; $! front windows
Program: GMH CCM Component: SEPDF Pass
Vendor: Quad Graphics Grade: 3
440!Need more practice? Download Extra Practice at connectED.mcgraw-hill.com
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