🔄 Inverse Operations 📚 Grade 2-3 ⏱ 6 min
Inverse Operations: Two Pairs That Undo Each Other
Addition and subtraction, multiplication and division — pairs of operations that undo each other. Understanding this link simplifies checking answers.
Addition and subtraction — partners
5+3=8, so 8−3=5 and 8−5=3. Three facts from one problem — know one, and you know all three.
💡 Practical benefit: check subtraction with addition. Solved 12−7=5? Check it: 5+7=12.
Multiplication and division — the same link
4×6=24, so 24÷6=4 and 24÷4=6. Division is multiplication in reverse, just as subtraction is addition in reverse.
FAQ
How does this link help solve problems?
It gives a way to check any answer through the reverse operation — no need to recalculate from scratch.