We included HMH Into Math Grade 2 Answer Key PDF Module 1 Lesson 7 Add 3 Numbers Using Mental Strategies and Properties to make students experts in learning maths.
HMH Into Math Grade 2 Module 1 Lesson 7 Answer Key Add 3 Numbers Using Mental Strategies and Properties
I Can find the sum of three numbers.
Spark Your Learning
How can you show the number of stuffed animals Logan has?
Answer:
Explanation: 6 + 2 = 8, 8 + 4 = 12.
Logan has 12 stuffed animals.
Read the following problem: Logan collects stuffed animals. He has 6 cats, 2 teddy bears, and 4 dogs. How many stuffed animals does Logan have? Have children use tools to add the three numbers.
Build Understanding
On the playground, there are 4 children playing ball, 3 children on the swings, and 2 children playing in a sandbox. How many children are on the playground?
A. How can you use tools to show each addend?
Answer:
B. How can you group two addends to odd first? Draw to show what you did.
Answer:
C. Complete the addition fact to solve the problem.
4 + 3 + 2 = ___
___ children
Explanation:
Add 4 + 3 = 7, 7 + 2 = 9
9 children are at the playground.
Turn and Talk How can you group the addends in a different order to solve the problem? Explain.
Step It Out
1. Alice has4 small toy boats, 5 toy cars, and 3 toy trucks. How many toys does she have?
A. Write an addition fact to show the problem.
___ + ___ + ___ =
B. Choose two addends to add first. Circle the addends.
THINK: Look for facts you know.
___ + ___ + ___ =
C. Add the two addends.
___ + ___ = ___
D. Add the sum and the third addend. Solve.
___ + ___ = ___ toys
Answer:
Explanation:
4 + 5 + 3 = 12
Alice have 12 toys.
Check Understanding Math Board
Question 1.
There are 4 pink pens, 5 red pens, and 5 blue pens in a box. How many pens are in the box? Write an addition fact to show the problem. Circle two addends to add first. Write the sum.
___ + ___ + ___ = ___
____ pens
Answer:
Explanation:
4 + 5 + 5 = 14
There are 14 pens in the box.
Choose two addends to odd first. Circle the addends. Write the sum.
Question 2.
3 + 2 + 6 = ___
Answer:
Explanation:
The sum of 3, 2 and 6 is 11.
Question 3.
5 + 1 + 3 = ___
Answer:
Explanation:
The sum of 5, 1 and 3 is 9.
On Your Own
Write an addition fact to show the problem. Circle two addends to add first. Write the sum. Solve.
Question 4.
Use Repeated Reasoning There are 4 rulers on the art table, 6 rulers on the math table, and 3 rulers on the science table. How many rulers are there?
___ + _____ + ____ = ____
_____ rulers
Answer:
Explanation:
The sum of 4, 6 and 3 is 13
There are 13 rulers.
Question 5.
Use Structure Nico folds 3 blue shirts, 2 red shirts, and 7 white shirts. How many shirts does Nico fold?
___ + ___ + ___ = ____
___ shirts
Answer:
Explanation:
The sum of 3, 2 and 7 is 12
Nico folded 12 shirts.
Attend to Precision Choose two addends to add first. Circle the addends. Write the sum.
Question 6.
7 + 2 + 2 = ___
Answer:
Explanation:
The sum of 7, 2 and 2 is 11.
Question 7.
0 + 6 + 9 = ___
Answer:
Explanation:
The sum of 0, 6 and 9 is 15.
Question 8.
5 + 0 + 7 = ___
Answer:
Explanation:
The sum of 5, 0 and 7 is 12.
Question 9.
4 + 5 + 1 = ___
Answer:
Explanation:
The sum of 4, 5 and 1 is 10.
I’m in a Learning Mindset!
How could I solve Problem 4 a different way?
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