Estimate the number of objects in collections of up to 200, and verify by counting
10 tutor-authored questions for this Ontario curriculum expectation, ordered easiest to hardest — every one with a full worked solution. Work through them free, no account needed.
Sample: the first question, solved
About how many objects are in a small, recognizable cluster of 3?
📘 Worked solution
✓About 3 — small groups can often be recognized at a glance.
And one from the hard end
A container has about 9 full rows of 20 items, plus one more row that's about half full. Estimate the total.
Solution shown after you try it in practice mode.
Work through all 10, easiest to hardest
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