①1.24×0.4÷1.24×0.4②1.2÷0.25＋1.3×4③9.14×1.25－1.14÷0.8用简便方法怎么算
①1.24×0.4÷1.24×0.4②1.2÷0.25＋1.3×4③9.14×1.25－1.14÷0.8用简便方法怎么算?
赞 cqwlliteng 幼苗
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①1.24×0.4÷1.24×0.4
=(1.24÷1.24)×(0.4×0.4)
=1×0.16
=0.16
②1.2÷0.25＋1.3×4
=1.2×4+1.3×4
=（1.2+1.3）×4
=2.5×4
=10
③9.14×1.25－1.14÷0.8
=9.14×1.25-1.14×1.25
=（9.14-1.14）×1.25
=8×1.25
=10
=(1.24÷1.24)×(0.4×0.4)
=1×0.16
=0.16
②1.2÷0.25＋1.3×4
=1.2×4+1.3×4
=（1.2+1.3）×4
=2.5×4
=10
③9.14×1.25－1.14÷0.8
=9.14×1.25-1.14×1.25
=（9.14-1.14）×1.25
=8×1.25
=10
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