Objects, diagrams, and equations for addition/subtraction sums up to 100
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
Use counters to model 21+13. What's the total?
📘 Worked solution
✓34.
And one from the hard end
A parking lot has 76 cars. 39 leave, then 45 more arrive. How many cars are in the lot now?
Solution shown after you try it in practice mode.
Work through all 30, easiest to hardest
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