| 1. Crack place value first This might seem like a no-brainer, but teaching rounding on top of an insecure understanding of place value is a recipe for disaster. Before pupils can get their heads around rounding, particularly to a given number of decimal places, they need to understand why 0.43 is bigger than 0.413, otherwise the whole thing's a write-off. |  Rounding using a number line |
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