Subtraction as a Confidence Builder
Grades 35 / Math / Multiple Methods
CCSS:
Math.3.NBT.A.2
Common Core State Standards
Math 
Math 
3 
Grade 3 
NBT 
Numbers & Operations in Base Ten 
A 
Use place value understanding and properties of operations to perform multidigit arithmetic 
2 
Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction. 
Download Common Core State Standards (PDF 1.2 MB) 
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 Lesson Objective
 Students gain confidence by using a variety of subtraction methods
 Length
 14 min
 Questions to Consider
 How do students subtract by making "jumps" on the number line?
 How does the "adding on" method help students see that addition and subtraction are related?
 How are students assessed by the head teacher, the teacher, and the teaching assistant?
 Common Core Standards
 Math.3.NBT.A.2
Supporting Materials

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Lesson Idea (Common Core) Subtraction as a Confidence Builder
Grades 35 / Math / Multiple Methods