
(拆分、连乘) 27、25×24 28、25×28 29、25×16 30、2
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(拆分、连乘)
27、25×24
=25x4x6
=100x6
=600
28、25×28
=25x4x7
=100x7
=700
29、25×16
=25x4x4
=100x4
=400
30、25x64
=25x4x16
=100x16
=1600
27、25×24
=25x4x6
=100x6
=600
28、25×28
=25x4x7
=100x7
=700
29、25×16
=25x4x4
=100x4
=400
30、25x64
=25x4x16
=100x16
=1600
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