We included HMH Into Math Grade 2 Answer Key PDF Module 14 Lesson 4 Use Drawings and Equations to Represent Two-Digit Subtraction to make students experts in learning maths.
HMH Into Math Grade 2 Module 14 Lesson 4 Answer Key Use Drawings and Equations to Represent Two-Digit Subtraction
I Can use bar models and equations to represent and solve two-digit subtraction word problems.
Spark Your Learning
How would you show this problem?
Shimo has some chapter books. She checks out 12 picture books from the library. Now she has 31 total books. How many chapter bocks does Shima have? Represent this problem with a concrete model and a visual model, and write an equation to match, Solve the problem.
Answer:
Explanation:
Shimo has some chapter books = x
She checks out 12 picture books from the library.
Now she has 31 total books. = 12 + x
Number of chapter bocks Shima have = 31 – 12 = 19
Build Understanding
Maya has 36 buttons. Fred has 20 fewer buttons than Maya. How many buttons does Fred have?
A. Complete the bar model to represent the problem.
Use a 
for the unknown number.
Answer:
B. Model the problem with a subtraction equation. Use a 
for the unknown number.
Answer:
= 36 – 20
C. How can you subtract to find the answer?
Answer:
Subtract the smaller number 20 from the bigger number 36.
D. Rewrite your equation and solve the problem.
36 – 20 = 16
E. How many buttons does Fred have?
Answer:
16 buttons
Explanation:
Maya has 36 buttons.
Fred has 20 fewer buttons than Maya.
Number of buttons Fred have 36 – 20 = 16
Turn and Talk How could you model this word problem with an addition equation?
Answer:
Fred has 16 buttons. Fred has 20 fewer buttons than Maya. How many buttons does Maya have?
Explanation:
Fred has 16 buttons.
Fred has 20 fewer buttons than Maya.
Number of buttons Maya have 16 + 20 = 36
While cleaning up, Ben puts away 31 blocks. Ben puts away 11 fewer blocks than Ronnie. How many blocks does Ronnie put away?
A. Complete the bar model to represent the problem. Use a 
for the unknown num ber.
Answer:
B. Write a subtraction equation to model the problem. Then model the problem with an addition equation. In each equation, use a 
for the unknown number.
Answer:
42 – 31 =
31 + 11 =
C. Rewrite your subtraction equation and solve the problem.
Answer:
42 – 31 = 11
D. How many blocks does Ronnie put away?
Answer:
42 blocks
Explanation:
While cleaning up, Ben puts away 31 blocks.
Ben puts away 11 fewer blocks than Ronnie.
Number of blocks Ronnie put away 31 + 11 = 42
Turn and Talk If Ben put away 11 blocks more than Ronnie but the same total number of blocks, how would this change your bar model? Explain.
Answer:
Explanation:
If Ben put away 11 blocks more than Ronnie but the same total number of blocks,
31 + 11 = 42
Step It Out
1. Corey opens a box of 37 crayons. 15 crayons fall to the ground. How many crayons are still in the box?
A. Complete the bar model with a 
for the unknown number
Answer:
B. Model the problem with a subtraction equation.
Use a for the unknown number.
Answer:
37 – 15 =
C. Subtract to find the unknown number in this problem.
Answer:
37 – 15 = 22
D. Solve. How many crayons are still ¡n the box?
Answer:
22 crayons
Explanation:
Corey opens a box of 37 crayons.
15 crayons fall to the ground.
Number of crayons still in the box = 37 – 15 = 22
Check Understanding Math Board
Complete the bar model. Write a subtraction equation with a 
for the unknown number. Write and solve your equation.
Question 1.
Tom has 27 flowers. 13 flowers are white, and the rest are yellow. How many flowers are yellow?
____________
____________ ____ flowers
Answer:
27 – 14 = 13
13 yellow flowers.
Explanation:
Tom has 27 flowers.
13 flowers are white, and the rest are yellow.
Number of yellow flowers = 27 – 14 = 13
On Your Own
Complete the bar model. Write a subtraction equation with a 
for the unknown number. Write and solve your equation.
At the park Rico counts 22 ladybugs. He counts 32 fewer ladybugs than ants. How many ants does Rico count?
____ ____ ants
Answer:
Explanation:
At the park Rico counts 22 ladybugs.
He counts 32 fewer ladybugs than ants.
Number of ants Rico count = 32 + 22 = 54
Question 3.
Some people are at the library. Then 37 more people go to the library. Now there are 62 people at the library. How many people were at the library to start?
______ _____ people
Answer:
Explanation:
Some people are at the library.
Then 37 more people go to the library.
Now there are 62 people at the library.
Number of people at the library to start 62 – 37 = 25
Question 4.
Model with Mathematics Complete the bar model. Write subtraction equations to represent and solve.
Answer:
51 – 27 = 23
Explanation:
Let the unknown addend be x
Sum is 51; one of the addend = 27
So, 51 – 27 = 23
On Your Own
Use Structure Complete the bar model. Write a subtraction equation with a 
for the unknown number. Write and solve your equation.
Question 5.
There are 67 pencils in a box. 50 pencils are sharpened. The rest of the pencils are not sharpened. How many pencils are not sharpened?
Answer:
Explanation:
There are 67 pencils in a box.
50 pencils are sharpened.
Number of pencils not sharpened = 67 – 50 = 17
Question 6.
Reba counts 25 daisies. Van counts 12 daisies. How many more daisies does Reba count than Van?
Answer:
Explanation:
Reba counts 25 daisies.
Van counts 12 daisies.
Number of more daisies Reba count than Van 25 – 12 = 13
I’m in a Learning Mindset!
If I struggled with a problem, how did I look at it in a different way?
Answer:
Answer may vary from student to student.
Explanation:
First I try to understand the problem by reading twice and thrice the question.
Then I will come up with the solution by using the given data.
Discuss with my classmates, teachers and parents.