1樓:凌月霜丶
(9.6+1.48÷
來3.7)÷8 5.8÷源[4×(1.34-0.14)] 簡便計算,要有過程
(9.6+1.48÷3.7)÷8 5.8÷[4×(1.34-0.14)]
=(9.6+0.4)÷8
=10÷8
=1.25
5.8÷[4×(1.34-0.14)]
=5.8÷(4*1.2)
=5.8÷4.8
=29/24
簡便計算;①2.8÷2分之1×2分之1÷0.7②【6分之5+12分之7+8分之3】÷48分之1③【1-4分之3】÷0.25×4 5
2樓:新野旁觀者
①2.8÷2分之1×2分之1÷0.7
=(2.8÷0.7)×(1/2÷1/2)
=4×1
=4②【6分之5+12分之7+8分之3】÷48分之1=【5/6+7/12+3/8】×48
=5/6×48+7/12×48+3/8×48=40+28+18
=86③【1-4分之3】÷0.25×4
=1/4×4÷0.25
=1÷0.25
=4④3.6÷【1.4÷7】-9
=3.6÷0.2-9
=18-9
=9⑤4分之5×4.8÷【3分之11÷3分之5+0.2】=6÷【2.2+0.2】
=6÷2.4
=2.5
⑥【1-(2分之1+3分之1)×5分之1】÷6分之5=【1-5/6×1/5】÷5/6
=【1-1/6】÷5/6
=5/6÷5/6
=1⑧【1-(四分之1+8分之3)】÷4分之1=【1-5/8】÷1/4
=3/8÷1/4
=1.5
計算下面各題(能簡算的要簡算)48-2.3×1250×(0.8+0.4)7.34×2.1+7.34×7.8+7.34×1.120.5÷1.25÷0.
3樓:淹了學校
①48-2.3×12,
=48-27.6,
=20.4;
②50×(0.8+0.4),
=50×0.8+50×0.4,
=40+20,
=60;
③7.34×2.1+7.34×7.8+7.34×1.1,=7.34×(2.1+7.8+1.1),
=7.34×10,
=73.4;
④20.5÷1.25÷0.8,
=20.5÷(1.25×0.8),
=20.5÷1,
=20.5;
⑤(8.1-5.4)÷3.6+85.7,
=2.7÷3.6+85.7,
=0.75+85.7,
=86.45;
⑥9.88×9+9.88,
=9.88×(9+1),
=9.88×10,
=98.8.
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