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How to decompose the problem of subtracting 6 from 34 in first grade mathematics
How to decompose the problem of subtracting 6 from 34 in first grade mathematics

34-6,4 is not enough, borrow the tenth 1,

That is 14-6=8.

Ten places left, 20,

20+8=28.

34-6

=20+ 14-6

=20+8

=28

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