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Subtraction Sense

From reading addition backwards to two-digit mental math — pick up the tricks that unstick a subtraction.

What you learn here

1. Addition, Backwards
2. Small Takeaways
3. Counting the Gap
4. Stopping at Ten
5. Two Digits Minus One
6. Two Digits Minus Two
7. Round, Then Give Back
8. Move Both, Gap Stays

8 lessons · Free · no sign-up needed