# Lesson Worksheet: Subtracting by Breaking Apart Ones Mathematics • 2nd Grade

In this worksheet, we will practice subtracting a 1-digit number from a 2-digit number by breaking apart ones and modeling this with equations.

Q1:

Help James take away 7 from 24 by breaking apart ones. First, take away the 4 ones:

.

We need to take away 7, how many more should we take away? Take away the remaining ones:

.

Q2:

If you know that , find .

Q3:

Use the given model to solve . Q4:

Fill in the blanks in the following equation: .

• A5, 2
• B5, 7
• C30, 2
• D2, 30

Q5:

Benjamin wants to solve , so he breaks apart 9, as shown. Help Benjamin find the missing numbers in .

• A3, 9
• B5, 4
• C4, 5
• D9, 5

What is the final result that Benjamin will get?

Q6:

What is ?

Hint: Break apart 5 using the given part-whole model to help you. Q7:

Complete the following: .

• A2, 37
• B3, 37
• C2, 38
• D7, 38

Q8:

• A
• B
• C
• D

What is the final result?

Q9:

Find the missing number in the given model. Q10:

Scarlett explains her method to find with a 100 square.  Using the same method, find .