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2nd Grade Math
8. NY.2.NBT.5
8.4 Counting to subtract up to 100
Counting to subtract up to 100
What You'll Learn
Count backwards from a larger number to find the difference
Apply counting-back strategy to subtract numbers within 100
Recognize subtraction as finding how many steps back from one number to another
Use mental counting strategies to solve subtraction problems efficiently
What You'll Practice
1
Subtracting by counting backwards from numbers up to 100
2
Using number lines or mental counting to find differences
3
Solving subtraction problems with single and double-digit numbers
Why This Matters
Counting backwards to subtract builds your mental math skills and number sense. This strategy helps you solve everyday problems like figuring out change, counting down time, or determining how many items are left without needing pencil and paper.
This Unit Includes
4 Video lessons
Practice exercises
Skills
Subtraction
Counting Backwards
Mental Math
Number Sense
Basic Operations
NY Curriculum Aligned