脱式计算:2.3+3.91÷(22-19.7) 1.25x88 0.8x0.4x0.125x25 100.7-(75+9.6÷0.4)
能简算的要简算,不要直接给答案,要分步计算.
人气:399 ℃ 时间:2020-05-01 10:24:14
解答
2.3+3.91÷(22-19.7)
=2.3+3.91÷2.3
=2.3+1.7
=4
1.25×88
=5/4×88
=110
0.8×0.4×0.125×25
=(0.8×0.125)×(0.4×25)
=0.1×10
=1
100.7-(75+9.6÷0.4)
=100.7-(75+24)
=100.7-99
=1.75/4这是什么意思?5/4表示4分之5,/是分数线,/的左边是分子,/的右边是分母我们还没有学到那么深的,我才五年级哦;1.25×88=1.25×(80+8)=1.25×80+1.25×8=100+10=110
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