Writing Subtraction Number Sentences

Understanding Addition and Subtraction

gettingStarted

math2_1_03_rabbit_CLP Discuss 
You have learned how to use addition number sentences to show parts and the whole. Today you will learn how to use subtraction number sentences to find the missing part of a whole.

There are 5 rabbits in my back yard.
rabbitrabbitrabbitrabbitrabbit

Some of the rabbits go into a rabbit hole. 

Out of the 5 rabbits, now I can only see 3.
rabbitrabbitrabbit

How many rabbits are in the hole?
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Show AnswerAnswer:
2 rabbits

Key Words

Keywords title header
  • difference
  • minus (–)
  • subtract
  • subtraction sentence
Keywords footer image



Objectives

You will
  • Solve problems by writing subtraction number sentences

Objectives derived from Pearson Education programs © Pearson Education, Inc., or its affiliates. All rights reserved.




Lesson Guide

Lesson-at-a-Glance

Topic: Writing Subtraction Number Sentences
Lesson:

• Read pages 12–13 with your student
• Discuss and complete the Guided Practice problems on page 12
• Complete the Independent Practice on pages 13–14

Assessment:

Quick Check

Key Words
difference
minus (–)
subtract
subtraction sentence

Essential Question
How can subtraction sentences be used to find the missing part of the whole?
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Engage
You have learned how to use addition number sentences to show parts and the whole. Today you will learn how to use subtraction number sentences to find the missing part of a whole.

There are 5 rabbits in my back yard.
 Show 5 fingers. Some rabbits go into a rabbit hole. Put 2 fingers down. Out of the 5 rabbits, I can only see 3. How many rabbits are in the hole? [ 2]
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