脱式计算(能简算的要简算)(1)

2021-03-17 06:50:03 字数 2887 阅读 8908

1楼:干堩

(1)12.75-5

17+11 4

-1217

,=(12.75+11 4

)-(5

17+12

17),

=14-1,

=13;

(2)[1-(1 5

+0.3)]÷1 8

,=[1-0.5]÷1 8

,=0.5÷1 8

,=4;

(3)2 9

×40%+7 9

÷5 2

,=(2 9

+7 9

)×40%,

=1×40%,

=0.4;

(4)1.25×3.2×2.5,

=(1.25×8)×(0.4×2.5),

=10×1,

=10.

脱式计算.(能简算的要简算)(1)12.75-517+114-1217(2)[1-(15+0.3)]

2楼:手机用户

(1)12.75-5

17+11

4-1217,

=(12.75+11

4)-(5

17+12

17),

=14-1,

=13;

(2)[1-(1

5+0.3)]÷18,

=[1-0.5]÷18,

=0.5÷18,

=4;(3)2

9×40%+79÷5

2,=(29+79

)×40%,

=1×40%,

=0.4;

(4)1.25×3.2×2.5,

=(1.25×8)×(0.4×2.5),

=10×1,

=10.

脱式计算.(能简算的要简算)(19.75-14.25)÷1.1+52 &...

3楼:眼睛高贵

(1)(19.75-14.25)÷

bai1.1+52

=5.5÷1.1+52

=5+52

=57;du

(2)1.25×zhi7.3×0.8

=1.25×0.8×7.3

=1×7.3

=7.3;

(3)8.37×17.2-8.37×7.2=8.37×(dao17.2-7.2)

=8.37×10

=83.7;

(4)4.32×101-4.32

=4.32×(100-1)

=4.32×100

=432.

脱式计算.(能简算的要简算)(1)143+3038686+90909434343+131313868686(2)6.75?2.75÷[10×(9.75?41

4楼:次纲毅

(1)1

43+303

8686

+90909

434343

+131313

868686,=1

43+3×101

86×101

+9×10101

43×10101

+13×10101

86×10101,=1

43+3

86+9

43+1386,

=(143

+943

)+(3

86+13

86),

=1043

+843

,=1843;

(2)6.75-2.75÷[10×(9.75-414)],

=6.75-2.75÷[10×(9.75-4.25)],=6.75-2.75÷[10×5.5],

=6.75-2.75÷55,

=6.75-0.05,

=6.7;

(3)0.365×640+31

2×36.5+365×0.01,

=36.5×6.4+3.5×36.5+36.5×0.1,=36.5×(6.4+3.5+0.1),

=36.5×10,

=365.

150*50-25*5(脱式计算。)(能简算的要简算)

5楼:恒新国仪科技****

运用乘法的结合运算,可以得出以下结论:

150*50-25*5

=25*6*5*10-25*5

=25*5*(6*10-1)

=125*(60-1)

=125*59

=7375

6楼:瀛洲烟雨

=7500-125

=7375

直接算最简便

脱式计算(能简算的要简算)2.5×7.1×4 16.12×99+16.12 &nb...

7楼:手机用户

(1)2.5×

du7.1×4

=(2.5×zhi4)×

dao7.1

=10×专7.1

=71(2)16.12×99+16.12

=16.12×(

属99+1)

=16.12×100

=1612

(3)5.2×0.9+0.9×4.8

=(5.2+4.8)×0.9

=10×0.9

=9(4)26×15.7+15.7×24

=(26+24)×15.7

=50×15.7

=785

(5)(2.275+0.625)×0.28=2.9×0.28

=0.812

(6)64-2.64×0.5

=64-1.32

=62.68

脱式计算:能简算的要简算。,脱式计算:一、能简算的要简算。③4/7×5/9+3/7×5/9 = = = =

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