简便计算.三克油.375×99 3.2×56+32×4.4
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简便计算.三克油.375×99 3.2×56+32×4.4
简便计算.三克油.
375×99 3.2×56+32×4.4
简便计算.三克油.375×99 3.2×56+32×4.4
375×99
=375×(100-1)
=375×100-375×1
=37500-375
=37125
3.2×56+32×4.4
=3.2×56+3.2×44
=3.2×(56+44)
=3.2×100
=320
375×99
=375*100-375*1
=37500-375
=37125
3.2×56+32×4.4
=32*5.6+32*4.4
=32*(5.6+4.4)
=32*10
=320
375*(100-1)
(32*0.1)*56+32*44*0.1
=32*(56+44)*0.1
=32*100*0.1