脫式計算(能簡算的要簡算)13 7

2021-03-17 01:11:04 字數 3476 閱讀 5301

1樓:yuy87帝把

(1)13.7×0.125×8,

=13.7×(0.125×8),

=13.7×1,

=13.7;

(2)0.8×[13-(3.12+5.28)],=0.8×[13-8.4],

=0.8×4.6,

=3.68;

(3)102×0.56,

=(100+2)×0.56,

=100×0.56+2×0.56,

=56+1.12,

=57.12;

(4)1.53×1.7+0.47×1.7,=(1.53+0.47)×1.7,

=2×1.7,

=3.4.

脫式計算,寫出主要計算過程,能用簡便演算法的要用簡便演算法. ①12× 3 8 ÷ 3 4

2樓:貓武士創作

①12×

bai3 8

÷du3 4

=12×3 8

×4 3

=6;②4 9

+5 9

×9=4 9

+5=54 9

;③14÷(

zhidao1 3

+5 6

)×3 4

=14÷7 6

×3 4

=14×6 7

×3 4

=9;④3.6-2.8+16.4-7.2

=(3.6+16.4)-(2.8+7.2)=20-10

=10;

⑤77×4 5

+23×0.8

=(77+23)×0.8

=100×0.8

=80.

用遞等式計算,能簡算的要簡算.(18%)(1)25×12-850÷17(2)(3.2÷16+10.8)÷22(3)3.2×12.5×2

3樓:匿名使用者

(du1)25×zhi12-850÷

dao17

=25×4×3-50,

=300-50,

=250;

(2)(3.2÷16+10.8)÷22

=(0.2+10.8)÷22,

=11÷22,

=0.5;

(3)3.2×12.5×2.5

=0.8×4×12.5×2.5,

=(12.5×0.8)×(2.5×4),

=10×10,

=100;

(4)7.05-3.84-0.16-1.05=7.05-1.05-(3.84+0.16),=6-4,

=2;(5)8

17×9-8÷17 8

=817

×9-8×8

17,=(9-8)×8

17,=1×8

17,=8

17;(6)5 6

×[2÷(7 8

-3 4

)]=5 6

×[2÷1 8

],=5 6

×16,

=40 3.

脫式計算(能簡算要簡算)?

4樓:妙酒

3.76+4.25+5.75 +12-

3.27-0.73+ 60.

49-36+5.51,『=(4.25+5.

75)+12-(3.27+0.73)-36+(60.

49+5.51)+3.76

=10+12-4-36+66+3.76

=51.76

5樓:老任

解:1 . 3.76+4.25+5.75

=3.76+(4.25+5.75)

=3.76+10

=13.76

2. 12-3.27-0.73

=12-(3.27+0.73)

=12-4

=83. 60.49-36+5.51

=(60.49+5.51)-36

=66-36=30

6樓:原宇衛香旋

(54+9/13)÷9

36÷【

(5/6-1/3)×3】

5/7+8/7÷2

2-6/13÷9/2-2/3

=(54+9/13)×1/9

=36÷2/3

=5/7+4/7

=2-4/39-2/3

=54×1/9+9/13×1/9

=54=9/7

=2-(4/39+2/3)

=6+1/13

=48/39=16/13

=79/13或6

1/13

【3/5-(2/4-2/5)】÷4

=【3/5-1/10】÷4

=1/2÷4

=1/8

希望我答

幫助純手打辛苦~

脫式計算,能簡算的要簡算 22.3-2.45-5.3-4.55 920÷[12×(25+13)] [43.3×(2-75%)+7]×12

7樓:手機使用者

(1)22.3-2.45-5.3-4.55,=(22.3-5.3)-(2.45+4.55),=17-7,

=10;

(2)9

20÷[1

2×(25+1

3)],

=920

÷[12

×1115

],=9

20÷1130,

=2722

;(3)[43.3×(2-75%)+7]×12,=[43.3×1.25+7]×12,

=[54.125+7]×12,

=61.125×12,

=30.5625;

(4)9

20×103?9

20×3,

=920

×(103?3),

=920

×100,

=45;

(5)5

9÷5+4

9÷4,=19

+19,=2

9;(6)12?6

13÷9

26?23,

=12-43-2

3,=12-(43+2

3),=12-2,

=10.

脫式計算【可以簡便的要簡便】 (1/8-3/14+1/7)*12

8樓:匿名使用者

(1/8-3/14+1/7)*12

=(1/8-3/14+2/14)×12

=(1/8-1/14)×12

=3/2-6/7

=21/14-12/14

=9/14

9樓:

(1/8-3/14+1/7)*12

=(1/8-1/14)x12

=(14/112-8/112)x12

=6/112x12

=9/14

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