Together we'll hit four targets on the grid, in this order: 0.10 first (a full row of ten), then 0.03, then 0.40, and finally 0.62. For each one, say the decimal aloud, count the squares you'll shade, then press Check to see if the grid agrees. The zeros are the ones that catch people out, so we'll say each one aloud before we check it.

Today we work through these targets on the grid, in order: shade 0.01, then 0.10, then 0.25, and finally 0.75. Each one is a step trickier than the last — a single square, then a full row, then a quarter of the whole, then three quarters. Predict how much of the square will be covered before each reveal.