6.58*99.9+0.658用简便计算怎么做
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6.58*99.9+0.658用简便计算怎么做6.58*99.9+0.658用简便计算怎么做6.58*99.9+0.658用简便计算怎么做6.58*99.9+0.658=6.58*99.9+0.658
6.58*99.9+0.658用简便计算怎么做
6.58*99.9+0.658用简便计算怎么做
6.58*99.9+0.658用简便计算怎么做
6.58*99.9+0.658
=6.58*99.9+0.658*1
=6.58*99.9+6.58*0.1
=6.58*(99.9+0.1)
=6.58*100
=658
6.58*99.9+0.658
=6.58*（100-0.1）+0.658
=658-0.658+0.658
=658 .
8.8÷0.25 =8.8×4 =8×4+0.8×4 =32+3.2 =35.2 3.1÷0.125 =3.1×8 =24.8 34.2×5.6+658×0.56 =342×0.56+658×0.56
6.58*99.9+0.658
=6.58*99.9+6.58*0.1
=6.58*(99.9+0.1)
=6.58*100
=658