Use the properties of addition and subtraction and their relationship
30 tutor-authored questions for this Ontario curriculum expectation, ordered easiest to hardest, every one with a full worked solution. Work through all 30 with your weekly-lesson access code.
Sample: the first question, solved
If 3 + 4 = 7, what is 7 − 4?
📘 Worked solution
✓3, since addition and subtraction undo each other.
And one from the hard end
Using only the fact that 9 + 5 = 14, find three related facts (one more addition fact, and two subtraction facts) without recalculating from scratch.
Solution shown after you try it in practice mode.
Work through all 30, easiest to hardest
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