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.


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:



If you know that 8=6+2, find 268.


Use the given model to solve 337.


Fill in the blanks in the following equation: 357=35=302=28.

  • A5, 2
  • B5, 7
  • C30, 2
  • D2, 30


Benjamin wants to solve 649, so he breaks apart 9, as shown.

Help Benjamin find the missing numbers in 645=60.

  • A3, 9
  • B5, 4
  • C4, 5
  • D9, 5

What is the final result that Benjamin will get?


What is 725?

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


Complete the following: 457=455=.

  • A2, 37
  • B3, 37
  • C2, 38
  • D7, 38


Which of the following equations can help you solve 457?

  • A4057
  • B4557
  • C4052
  • D4552

What is the final result?


Find the missing number in the given model.


Scarlett explains her method to find 369 with a 100 square.

Using the same method, find 268.

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