简算.65x102-65x2 73x95+73x6 - 知识问答

简算.65x102-65x2 73x95+73x6-73 720x5+28x50

3个回答

65x102-65x2
=65x(102-2)
=65x100
=6500
73x95+73x6-73
=73x(95+6-1)
=73x100
=7300
720x5+28x50
=72x50+28x50
=50x(72+28)
=50x100
=5000

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