4.55×0.28+4.55×0.28-4.55脱式计算?
2个回答
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4.55×0.28+4.55×0.28一4.55
=4.55×(0.28+0.28一1)
=4.55×(0.56一l)
=4.55×0.44
=(4.5+0.05)(0.4+0.04)
=1.8+0.18+0.02+0.002
=1.98+0.02+0.002
=2.002
=4.55×(0.28+0.28一1)
=4.55×(0.56一l)
=4.55×0.44
=(4.5+0.05)(0.4+0.04)
=1.8+0.18+0.02+0.002
=1.98+0.02+0.002
=2.002
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