Estimate the number of objects in collections of up to 200, and verify by counting
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
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 picture shows 9 full groups of 20 plus a partial group that looks about half full. Which is the best estimate of the total?
Solution shown after you try it in practice mode.
Work through all 30, easiest to hardest
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