用遞等式計算。(能簡便計算的用簡便方法計算)2 5(3 8 0 4)

2021-04-30 04:13:57 字數 3829 閱讀 8359

1樓:凌月霜丶

2.5×(3.8×0.4) 4.6×0.33+5.4×0.33

= 3.8*(2.5*0.4) =0.33*(4.6+5.4)

=3.8*1 =0.33*10

=3.8 =3.3

0.25×39+0.25 8.36-2.48-3.52

= 0.25*(39+1) =8.36-(2.48+3.52)

= 0.25*40 =8.36-6

=10 =2.36

2樓:

2.5×(3.8×0.4)

= 2.5x0.4x3.8

=1x3.8

= 3.8

4.6×0.33+5.4×0.33

=(4.6+5.4)x0.33

=10x0.33

=3.3;

0.25×39+0.25

=0.25x(39+1)

=0.25x40

=10;

8.36-2.48-3.52

=8.36-(2.48+3.52)

=8.36-6

=2.36.

供參考。

用遞等式計算,能簡便計算的要用簡便方法計算. 38%× 3 5 +0.4× 19 50 89

3樓:楓島

(1)38%×3 5

+0.4×19

50,=0.38×0.6+0.4×0.38,

=(0.6+0.4)×0.38,

=0.38;

(2)89×6.3+48.9×0.37,

=560.7+18.093,

=578.793;

(3)134

11-(22 3

-1711

),=134

11+17

11-22 3

,=15-22 3

,=121 3

;(4)2.5×3 7

×0.4×21 3

,=(2.5×0.4)×(3 7

×7 3

),=1×1,

=1;(5)158-92+42-8,

=(158+42)-(92+8),

=200-100,

=100;

(6)83.2÷(83.2÷11),

=83.2÷83.2×11,

=11.

用遞等式計算(能簡便計算的用簡便方法計算):(1)4.2÷0.25(2)1.46+(7.7+0.54)+2.3(3)(4.77+1.

脫式計算 (能用簡便方法的簡便計算)①2.07÷2.5÷0.4 ②21.36÷0.8-12.9 ③0.125×32×2.5 ④0.65×201

4樓:喬叔總攻

①2.07÷2.5÷0.4,

bai=2.07÷(du2.5×zhi0.4),=2.07÷1,

=2.07;

dao②21.36÷0.8-12.9,

=26.7-12.9,

=13.8;

③0.125×32×2.5,

=0.125×8×4×2.5,

=(0.125×8)×(4×2.5),

=1×10,

=10;

④0.65×201,

=0.65×(200+1),

=0.65×200+0.65×1,

=130+0.65,

=130.65;

⑤1.2×2.5+8×0.25,

=1.2×2.5+0.8×2.5,

=(1.2+0.8)×2.5,

=2×2.5,

=5;⑥50.4×19+50.4,

=50.4×(19+1),

=50.4×20,

=1008.

脫式計算,能簡便的要簡便計算. 14-11.3-1.7 54÷2.5÷0.4 3.2×0.2

5樓:泡沫

(1)14-11.3-1.7,

=14-(11.3+1.7),

=14-13,

=1;(2)54÷2.5÷0.4,

=54÷(2.5×0.4),

=54÷1,

=54;

(3)3.2×0.28+0.28×6.8,=(3.2+6.8)×0.28,

=10×0.28,

=2.8;

(4)80.3-33.3×0.5÷0.37,=80.3-16.65÷0.37,

=80.3-45,

=35.3.

6樓:買群刀仕

3.6÷0.4-1.2×5

=9-6=3

90÷【3.6-1.8】=90/1.8=50

【31.6-11.7】÷2.

5÷0.4=【31.6-11.

7】÷(2.5*0.4)=【31.

6-11.7】÷1=31.7-0.

1-11.7=19.9

3.4×7.8÷3.9=3.4*(7.8÷3.9)=3.4*2=6.8

5.23×4+4.77÷0.25=5.23×4+4.77×4=(5.23+4.77)×4=10×4=40

基本思路就是結合法,分子分母同時放大等倍數

法,再簡單?那就用筆挨個做除法吧!這些很容易理解的,你可以好好的看一下!

遞等式計算,能簡便計算的一定要簡便計算.25×40.1 12.5×3.2 100.d8÷d (0.25+0.25+0.2

7樓:鄭雨328丶

(1)25×45.1

=25×(45+5.1),

=25×45+25×5.1,

=155+2.5,

=152.5;

(2)12.5×手.2

=12.5×5.8×4,

=15×4,

=45;

(手)155.t8÷t

=(tt+1.t8)÷t.

=tt÷t+1.t8÷t,

=11+5.22,

=11.22;

(4)(5.25+5.25+5.25)×4=手×(5.25×4),

=手×1,

=手;(5)5.84÷2.5÷5.4

=5.84÷(2.5×5.4),

=5.84÷1,

=5.84.

用遞等式的格式計算(能簡算的可以用簡便方法計算)7.2÷1.8+6.8×0.53.7+6.3÷0.6-0.43.5÷〔(0.45-0.3

8樓:百度使用者

(1)7.2÷1.8+6.8×0.5,

=4+3.4,

=7.4;

(2)3.7+6.3÷0.6-0.4,

=3.7+10.5-0.4,

=14.2-0.4,

=13.8;

(3)3.5÷[(0.45-0.38)×0.1],=3.5÷(0.07×0.1),

=3.5÷0.007,

=500;

(4)5.6×7.2+4.4×7.2,

=(5.6+4.4)×7.2,

=10×7.2,

=72.

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