如题所述
解:
22×28
=(20+2)×(30-2)
=20×30-20×2+2×30-2×2
=600-40+60-4
=620-4
=616
22×28
=(20+2)×(30-2)
=20×30-20×2+2×30-2×2
=600-40+60-4
=620-4
=616
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第1个回答 2023-03-15
22乘以28怎么快速计算?
解:22x28
=(20+2)x28
=20x28+2x28
=560+56
=616.本回答被网友采纳
解:22x28
=(20+2)x28
=20x28+2x28
=560+56
=616.本回答被网友采纳