Estimate the number of objects in collections of up to 50, 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 dots are in a small, easily-recognized cluster like ⚫⚫⚫⚫⚫?
📘 Worked solution
✓About 5 - small groups like this can often be recognized at a glance.
And one from the hard end
A picture shows 4 full groups of ten and a partial group that looks about a third full. What's a reasonable estimate for the total?
Solution shown after you try it in practice mode.
Work through all 30, easiest to hardest
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