What this worksheet practices
Subtraction with regrouping is one of the first places where a written procedure can hide the math. The student is not borrowing and giving back later. They are rewriting the top number so that one ten becomes ten ones, making the ones-place subtraction possible.
The balloon stand makes borrowing concrete: one tied bundle of ten balloons is untied into ten single balloons, so the ones place has enough to subtract. Students see regrouping as the same total rewritten by place value, not as a magic borrowing step.
When a child gets stuck, ask them to say the value of the top number before and after regrouping. For example, 71 can become 6 tens and 11 ones, but it is still 71. That statement is the conceptual bridge from blocks and drawings to pencil-and-paper subtraction.
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