脫式計算,能簡便計算就簡便。4 75十1 25 ,2 4x0 36 8,

2021-04-30 04:27:47 字數 2641 閱讀 7350

1樓:瀛洲煙雨

14.4÷(1.75+1.25)

=14.4÷3

=4.8

直接算最簡便

脫式計算,能簡便計算的要簡算. (1)13÷0.4÷2.5 (2)64×4.5+36×4.5 (3)1.25×2.5×0.8

2樓:手機使用者

(1)13÷0.4÷2.5,

=13÷(0.4×

回2.5),

=13÷1,

=13;

(2)64×4.5+36×4.5,

=(64+36)×答4.5,

=100×4.5,

=450;

(3)1.25×2.5×0.8,

=1.25×0.8×2.5,

=1×2.5,

=2.5;

(4)1.5×101-1.5,

=1.5×(101-1),

=1.5×100,

=150;

(5)14.64+3.7×2.8,

=14.64+10.36,

=25;

(6)2.8×7.3+0.27×28,

=2.8×7.3+2.7×2.8,

=2.8×(7.3+2.7),

=2.8×10,

=28.

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 ④0.65×20

3樓:鑽石

①源2.07÷2.5÷0.4,

bai=2.07÷(2.5×

du0.4),

=2.07÷1,zhi

=2.07;

②21.36÷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;

④dao0.65×201,

=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

4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.

5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!

脫式計算(能簡算的用簡便演算法).(1)[9.2+0.8×(9-7.75)]÷0.4; (2)3.5×9.8+0.35×2;(3)

6樓:寧負迅昭

(1)[9.2+0.8×(

9-7.75)]÷0.4

=[9.2+0.8×1.25]÷4

=[9.2+1]÷4

=2.55

(2)3.5×9.8+0.35×2

=3.5×(9.8+0.2)

=3.5×10

=35(3)28×26

27=(27+1)×

2627

=27×26

27+26

27=26+26

27=2626

27(4)[(23-3

5)×154+2

3]÷11

12=[1

15×154+2

3]÷11

12=[14+2

3]÷11

12=11

12×12

11=1

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