Subtract multiples of 10 in the range 10-90 from multiples of 10 in the range 10-90, explaining the reasoning, using:
Concrete models and drawings
Number lines
Strategies based on place value
Properties of operations
The relationship between addition and subtraction
Step 1: Lesson Standards & Learning Goals
What strategies can we use to subtract within 100?
How does understanding place value help us solve subtraction problems?
How can we use number lines to represent subtraction problems?
How can we use models and manipulatives to represent subtraction problems?
Explain your reasoning for the strategies you used to solve the problem.
equation
models
number line
place value
subtract
tens
Use concrete models, drawings, and pace-value strategies to subtract multiples of 10 from multiples of 10 in the range 10-90.
Explain their reasoning for how they solved the problem.
Multiple strategies can be used to subtract including:
number lines
models
hundreds charts
counting back
Step 2: Assessment
NCDPI Math Assessment Released Forms
Grade 1 Math Assessment Practice Prompts
Grade 1 Released Summative Assessments
Video Clip
Video Clip
Video Clip
Tools 4 NC Teachers
Cluster 5 Lessons
Math Expressions - (Barnes and Hearne) - Standards Alignment
Motivation Math
Think Up! Math
Khan Academy - 1st Grade Math
Eureka Math/Engage NY Free Resources
Topic A: Tens and Ones
Topic B: Numbers to 120
Zearn Math - Online Support Practice for Eureka Math (Requires free account)
North Carolina Collaborative for Mathematics Learning - Grade 1 Instructional Framework
NCDPI Resources
Grade 1 Math Assessment Practice Prompts
