計算下面各題,能簡算的簡算6c,計算下面各題,能簡算的簡算6c854c

2021-03-04 01:40:00 字數 3321 閱讀 3919

1樓:回憶

(下)3 v

×8 5

+4 v

÷5 8

,=3 v

×8 5

+4 v

×8 5

,=(3 v

+4 v

)×8 5

,=下×8 5

,=8 5

;(2)3 4

×40%+0.v5×3 5

,=0.v5×0.4+0.v5×0.6,

=0.v5×(0.4+0.6),

=0.v5×下,

=0.v5;

(3)5-v 8

-0.下25,

=5-0.8v5-0.下25,

=5-(0.8v5+0.下25),

=5-下,

=4;(4)下8

35÷0.9×5 6

,=4 v

×5 6

,=下02下.

計算下面各題,能簡算的要簡算 6 5 × 3 8 + 5 8 ÷ 5 6

2樓:神水盟

(1)6 5

×3 8

+5 8

÷5 6

,=6 5

×3 8

+5 8

×6 5

,=6 5

×(3 8

+5 8

),=6 5

×1,=6 5

;(2)7

16×[5

16+(9

16-1 4

÷1 2

)],=7 16

×[516

+(916

-1 2

)],=7 16

×[516

+916

-1 2

],=7 16

×[7 8

-1 2

],=7 16

×3 8

,=21

128;

(3)17 8

-0.35-1.65,

=17 8

-(0.35+1.65),

=17 8

-2,=1 8

;(4)(11-5)÷5 6

×613

,=6÷5 6

×613

,=36 5

×613

,=21665.

計算下面各題,能簡算的要簡算。(脫式計算) (6/35+4/21)÷4/7 2/ 50

3樓:匿名使用者

(6/35+4/21)÷4/7

=6/35×7/4+4/21×7/4

=3/10+1/3

=9/30+10/30

=19/30

2/9÷2/7÷14/15

=2/9×7/2×15/14

=14/18×15/14

=5/6

(5/6-3/4)÷5/12+4/5

=5/6×12/5-3/4×12/5+4/5=2-9/5+4/5

=2-13/5

=-3/5

3/10÷(4/5-1/2)

=3/10×5/4-3/10×2

=3/8-3/5

=15/40-24/40

=-9/40

2/25÷3/7+23/25÷3/7

=(2/25+23/25)÷3/7

=1×7/3

=2又1/3

8/9÷5/6+1/6

=8/9×6/5+1/6

=16/15+1/6

=32/30+5/30

=37/30

=1又7/30

2/3x=16

x=16×3/2

x=24

3/4x+1/4=3/8

3/4x=3/8-1/4

3/4x=1/8

x=1/8×4/3

x=1/6

1/5x-1/2=3/10

1/5x=1/2+3/10

1/5x=8/10

x=8/10×5x=4

4樓:**防騙

6/35x7/4十4/2lx7/4=3/10十1/3=9/30十10/30=19/30

2/9x7/2x1/14=1/185/6

計算下面各題,能簡算的用簡便方法計算。 18.9×9.9 12.5×8.94×0.8 7.4×0.5+7

5樓:l鮁

18.9×9.9

=18.9×(

10-0.1)

=189-1.89

=187.11

12.5×8.94×0.8

=(12.5×0.8)×8.94

=10×8.94

=89.4

7.4×0.5+7.4÷0.5

=7.4×(0.5+2)

=7.4×2.5

=18.5

4.92÷2.4

=2.05

6.8×32+32×3.2

=32×(6.8+3.2)

=320

(8.1-5.6)÷0.8+7.75

=2.5÷0.8+7.75

=10.875

5.92×2.5

=14.8

5.6×(12.5-8.5÷0.85)

=5.6×2.5

=5.6÷0.4

=143.5×[13-(3.12+5.28)]=3.5×(13-8.4)

=3.5×4.6

=16.1

計算下面各題能簡算的要簡算 1/4+(5/8-3/10)×1/13 5/8×4/3+5/8÷3

6樓:匿名使用者

1/4+(5/8-3/10)×1/13

=1/4 +(25/40-12/40)×1/13=1/4+13/40 ×1/13

=10/40 +1/40

=11/40

原式=5/8×4/3+5/8×4/3

=2×(5/8×4/3)

=2×5/6

=5/3

7樓:蹬可愛河岸

1/4+(5/8-3/10)×1/13

=1/4+13/40 ×1/13

=10/40+1/40

=11/40

5/8×4/3+5/8÷3/4

=5/8×(4/3+4/3)

=5/8×8/3

=1又2/3

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