Use appropriate non-standard units to measure area, and explain the effect of gaps and overlaps on accuracy
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
A student measures a wall using tiles that leave visible gaps between them. Will their tile count be too high or too low compared to the true area?
📘 Worked solution
✓The gaps represent wall space that isn't covered by any tile, so the tile count underestimates the true area, making it too low.
And one from the hard end
A student measures a shape's area with 20 square units but notices the squares overlap slightly in a few places. Is the true area more or less than 20?
Solution shown after you try it in practice mode.
Work through all 10, easiest to hardest
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