This activity/task is editable to suit your grade or students' needs.
It can be used as a warm-up quiz/task/ activity before a Maths lesson in order to develop students number sense, partitioning, place value and etc. This can consequentially improve students’ mental computation.
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Please note: I've tried my best to group everything, but things may or may not shuffle depending on your powerpoint program - how far you've set the margin, the default font size etc.