# Subtraction with Decompositions

Videos solutions to help Grade 2 students learn how to use math drawings to represent subtraction with up to two decompositions, relate drawings to the algorithm, and use addition to explain why the subtraction method works.

Common Core Standards: 2.NBT.7, 2.NBT.9

Related Topics:
Common Core Math Resources, Lesson Plans & Worksheets for all grades

Common Core Math Video Lessons, Math Worksheets and Games for Grade 2

Common Core Math Video Lessons, Math Worksheets and Games for all grades

## New York State Common Core Math Module 5, Grade 2, Lesson 14, Lesson 15

Topic C: Strategies for Decomposing Tens and Hundreds Within 1,000

### NYS Math Module 5 Grade 2 Lesson 14

Lesson 14 Homework

1. Solve by drawing number disks on a chart. Then, use addition to check your work.
b. 463 - 357
d. 861 - 673

### NYS Math Module 5 Grade 2 Lesson 15

Lesson 15 Homework

1. Solve by drawing chips on the place value chart. Then, use addition to check your work.
b. 742 – 495
e. 941 – 628

2. Complete all of the if...then statements. Draw a number bond to represent the related facts.
a. If 928 – ________ = 519, then 519 + 409 = _________.
b. If 764 – _______ = 391, then ________ + 391 = 764.