用簡便方法計算1 484 2 1 0 7

2021-04-30 04:14:59 字數 1454 閱讀 5211

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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