We included HMH Into Math Grade 2 Answer Key PDF Module 14 Lesson 2 Use Equations to Represent Addition and Subtraction Situations to make students experts in learning maths.
HMH Into Math Grade 2 Module 14 Lesson 2 Answer Key Use Equations to Represent Addition and Subtraction Situations
I Can use equations to represent and solve addition and subtraction word problems.
Spark Your Learning
How can you show the number of cubes Rylee has?
Joden has 11 cubes. Jade, has 5 more cubes than Rylee. How many cubes does Rylee have? Hove children represent the problem. Then have children write an equation to model the problem.
Build Understanding
Ondra jumps rope 14 times. Alyssa jumps rope 6 fewer times than Ondra. How many times does Alyssa jump rope?
A. Complete the bar model to represent this Compare problem.
Answer:
B. Complete the equation to model the problem.
Answer:
8 = 14 – 6
C. Solve. Alyssa jumps rope
Answer:
14 – 6 = 8
Alyssa jumps rope 8 times.
Explanation:
Ondra jumps rope 14 times.
Alyssa jumps rope 6 fewer times than Ondra.
Number of times does Alyssa jump rope = 14 – 6 = 8
Colin has 13 craft sticks. Colin has 9 more craft sticks than Mary. How many craft sticks does Mary have?
A. Complete the bar model to represent this Compare problem.
Answer:
B. Complete the equation to model the problem.
Answer:
4 = 13 – 9
C. Solve. Mary has ___ craft sticks.
Answer:
13 – 9 = 4
Mary has 4 craft sticks.
Explanation:
Colin has 13 craft sticks.
Colin has 9 more craft sticks than Mary.
Number of craft sticks does Mary have = 13 – 9 = 4
Turn and Talk How can you check your answers?
Answer:
To check the answers to find the unknown numbers,
we use equations to represent addition and subtraction facts.
Jose has some baseball cards. He gives 8 cards to Elena. Now Jose has 9 baseball cards. How many baseball cards did Jose have to start?
A. Complete the bar model to represent this Take From problem.
Answer:
B. Model the problem with an equation. Use a 
for the unknown number.
___________________________
Answer:
= 8 + 9
17 = 8 + 9
C. Write and solve your equation.
____________________________
Jose had ___ baseball cards to start.
Answer:
8 + 9 = 17
Jose had 17 baseball cards to start.
Explanation:
Jose has some baseball cards = x
He gives 8 cards to Elena = x – 8
Now Jose has 9 baseball cards.
Number of baseball cards Jose have to start
9 = x – 8
x = 9 + 8 = 17
Some horses are in the field. Then 8 more horses come to the field. Now there are I I horses in the field. How many horses were in the field to start?
A. Complete the bar model to represent this Add To problem.
Answer:
B. Model the problem with an equation. Use a 
for the unknown number.
Answer:
C. Write and solve your equation.
There were ___ horses in the field to start.
Answer:
11 – 8 = 3
There were 11 horses in the field to start.
Explanation:
Number of horses in the field = x
Then 8 more horses come to the field = x + 8
Now there are I I horses in the field.
Number of horses in the field to start
x + 8 = 11
x = 11 – 8 = 3
Step It Out
1. Choi slides 15 times. Mio slides 7 fewer times than Choi. How many times does Mio slide?
A. Complete the bar model to represent this problem.
Answer:
B. Model this Compare problem with an equation. Use a 
for the unknown number.
THINK: The holds the place of the number that is unknown.
___ = ____ – ____
Answer:
= 15 – 7
C. Solve, _____ times
Answer:
15 – 7 = 8 times.
Explanation:
Choi slides 15 times.
Mio slides 7 fewer times than Choi.
Number of times does Mio slide = 15 -7 = 8
Check Understanding Math Board
Complete the bar model. Write an equation with a for the unknown number. Write and solve your equation.
Question 1.
Thomas has 9 books. Thomas has 4 fewer books than Jodi. How many books does Jodi have?
____________
____________ ___ books
Answer:
Jodi have 13 books.
9 + 4 = 13
Explanation:
Thomas has 9 books.
Thomas has 4 fewer books than Jodi.
= 9 + 4 = 13
13 – 4 = 9
Number of books does Jodi have = 13
Explanation:
Thomas has 9 books.
Thomas has 4 fewer books than Jodi = x – 4
Number of books Jodi have = 9 + 4 = 13
13 – 9 = 4
Question 2.
Amina has 12 apple slices. Cairo has 7 fewer apple slices than Amina. How many apple slices does Cairo have?
____________________________
______ ______ apple slices ____
Answer:
5 apple slices
On Your Own
Use Structure Complete the bar model. Write an equation with a 
for the unknown number. Write and solve your equation.
Question 3.
Some children play soccer. Then 8 children go home. Now 5 children play soccer. How many children played soccer to start?
____________________________
____________________________ _________ children.
Answer:
13 children
= 8 + 5
13 = 8 + 5
Explanation:
Some children play soccer = x
Then 8 children go home = x – 8
Now 5 children play soccer.
Number of children played soccer to start
x – 8 = 5
x = 8 + 5
x = 13
Question 4.
Ava has 15 toy cars. Ava has 6 more toy cars than Rohan. How many toy cars does Rohan have?
____________________________
____________________________ _________ blocks.
Answer:
Rohan have 9 blocks
Explanation:
Ava has 15 toy cars.
Ava has 6 more toy cars than Rohan = x + 6
Number of toy cars does Rohan have
15 = x + 6
x = 15 – 6 = 9
Question 5.
Joanna has some blocks. Dirk gives her 4 blocks. Joanna now has 12 blocks. How many blocks did she have to start?
____________________________
________________ ______ blocks
Answer:
8 blocks
= 12 – 4
8 = 12 – 4
Explanation:
Joanna has some blocks = x
Dirk gives her 4 blocks = x + 4
Joanna now has 12 blocks.
Number of blocks Joanna have to start
12 = x + 4
x = 12 – 4
x = 8 blocks
Question 6.
Open-Ended Write a word problem that could be represented by this bar model. Solve.
____________________________
____________________________
Answer:
Eva has 6 toy cars. Eva has 2 fewer toy cars than Rosey. How many toy cars does Rosey have?
Explanation:
= 6 + 2 = 8
On Your Own
Complete the bar model. Write an equation with a 
for the unknown number. Write and solve your equation.
Question 7.
Ashur sees 5 deer. Ashur sees 9 fewer deer than Shyra. How many deer does Shyra see?
_______________________
_______________________ ________ deer ________
Answer:
Shyra sees 14 Deers
= 5 + 9 = 14
Explanation:
Ashur sees 5 deer.
Ashur sees 9 fewer deer than Shyra = x – 9
Number of deer does Shyra see
5 = x – 9
x = 5 + 9 = 14
Question 8.
Some chickens are in the barn. 7 chickens leave. Now there are 5 chickens in the barn. How many chickens were in the barn to start?
_______________________
_______________________ _____ chickens
Answer:
12 chickens
= 7 + 5 = 12
Explanation:
Some chickens are in the barn = x
7 chickens leave = x – 7
Now there are 5 chickens in the barn.
Total chickens in the barn to start = 7 + 5 = 12
Question 9.
Cheng sees 16 birds. Cheng sees 8 more birds than Emily. How many birds does Emily see?
_______________________
_____ ________ birds _____
Answer:
16 – 8 =
Emily sees 8 birds.
Explanation:
Cheng sees 16 birds.
Cheng sees 8 more birds than Emily = x + 8
Number of birds does Emily see = 16 – 8 = 8
Question 10.
Reason Explain how you solved Problem 9.
Answer:
To know the number of birds seen by Emily,
first I should know how many birds Cheng saw more than Emily.
Cheng sees 16 birds. Cheng sees 8 more birds than Emily. How many birds does Emily see?
I’m in a Learning Mindset!
Are my efforts effective? How do I know?
____________________________
Answer:
Yes, efforts are effective.
Explanation:
Mindset of a child depends upon the intelligence and talents of individual.
When the child understands the concept well by practicing more and more,
then the efforts are effective.