下面各题怎样简便就怎样算14.4÷0.125÷8(16+18)×24×152.34×56-23.4×5.61.5×45+0.8×5.5+2×451005÷[42×(56-57)]1235÷[1-(15+17)].-数学
题文
下面各题怎样简便就怎样算
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答案
(1)14.4÷0.125÷8, =14.4÷(0.125×8), =14.4÷1, =14.4; (2)(
=
=
=
(3)2.34×56-23.4×5.6, =2.34×56-2.34×56 =2.34×(56-56), =0; (4)1.5×
=1.5×0.8+0.8×5.5+2×0.8, =(1.5+5.5+2)×0.8, =9×0.8, =7.2; (5)1005÷[42×(
=1005÷[42×
=1005÷[35-30], =1005÷5, =201; (6) |