Overview
Practice
Watch
Read
Next Steps
Overview
Grade 2 Math
Number
1. Demonstrate and explain the effect of adding zero to or subtracting zero from any number
1.6 Counting to subtract up to 100
Counting to Subtract Up to 100
Discover how counting back turns subtraction up to 100 into simple, countable steps using a number line and small jumps.
What You'll Learn
Count back from the larger number one step at a time to find a difference such as \( 74 - 3 \)
Use a number line to see each backward jump as subtracting 1
Combine counting back by tens and by ones when the number being subtracted is bigger
Recognize that counting back works best when the number being subtracted is small, such as 1, 2, or 3
Check the answer by counting forward from the difference back up to the original number
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
Learning resources
Skills
Subtraction
Counting Backwards
Mental Math
Number Sense
Basic Operations
NS Curriculum Aligned