脫式計算(能簡算的要簡算),脫式計算 (能簡算的要簡算)1840 725 25 16

2021-03-17 01:39:46 字數 2621 閱讀 7046

1樓:匿名使用者

(1)1840-725÷25×16,

=1840-29×16,

=1840-(30-1)×16,

=1840-30×16+16,

=1360+16,

=1376;

(2)278?8

17?917,

=278

?(817

+917

),=27

8?1,

=198

,=238;

(3)16.4+3.5+83.6+166.5,=(16.4+83.6)+(3.5+166.5),=100+170,

=270;

(4)(89+4

3)×34-1

4,=89

×34+43

×34-14

,=23+1-14,

=23-14

+1,=5

12+1,

=1512

;(5)59+59×13+14×41,

=(1+13)×59+14×41,

=14×59+14×41,

=(59+41)×14,

=100×14,

=1400;

(6)36÷[(56-1

3)×3],

=36÷[5

6×3-1

3×3],

=36÷32,

=36×23,

=24.

脫式計算(能簡算的要簡算)(12.5+7.5)÷0.25310-10×46.18÷6+

2樓:欲貓人

(1)(12.5+7.5)÷0.25

=20÷0.25

=80(2)310-10×4

=310-40

=270

(3)6.18÷6+4

=1.03+4

=5.03

(4)2÷8

5×25

4=2×5

8×25

4=125

16(5)13.1×56+5.6×69

=131×5.6+5.6×69

=(131+69)×5.6

=200×5.6

=1120

(6)2÷23-2

3÷2=2×32-2

3×12=3-1

3=223

脫式計算(能簡算的要簡算

3樓:軒胤

(1)6.72-2.3÷0.5×0.8

=6.72-4.6×0.8

=6.72-3.68

=3.04;

(2)98-1

7+18-6

7=(98+1

8)-(17+6

7)=54

-1=14;

(3)9

10÷[1

2×(65-3

10)]

=910

÷[12

×910]=9

10÷9

20=2;

(4)(27+1

5)×7×5=27

×7×5+1

5×7×5

=10+7

=17.

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

4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

5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

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