A 100 number square is an essential item to help young children with their maths. This worksheet takes parts of the number squares and asks for the missing numbers to be filled in. It is interesting to watch how children do this kind of activity as it involves both counting on and counting back and a realisation that the number immediately below is always ten more. Most children will prefer to work from left to right, counting up, but they should be encouraged to also work from right to left, counting back, and vertically, pointing out that the units remain the same, but the tens increase by one ten for each square below.
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