45.3*1.3 怎么简算 脱式计算
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45.3*1.3 怎么简算 脱式计算
45.3*1.3
=(45+0.3)*1.3
=45*1.3+0.3*1.3
=(50-5)*1.3+0.39
=50*1.3-5*1.3+0.39
=65-6.5+0.39
=58.5+0.39
=58.89
45.3*1.3 怎么简算 脱式计算
45.3*1.3
=(45+0.3)*1.3
=45*1.3+0.3*1.3
=(50-5)*1.3+0.39
=50*1.3-5*1.3+0.39
=65-6.5+0.39
=58.5+0.39
=58.89