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简算大全 计算(能简算的一定要简算)(1)1+2+3+4+5+6+7+8+7+6+5+4+3+2+1888888×888888(2)113×8+218×13+3113

火烧 2022-09-11 03:57:44 1184
计算(能简算的一定要简算)(1)1+2+3+4+5+6+7+8+7+6+5+4+3+2+1888888×888888(2)113×8+218×13+3113 计算(能简算的一定要简算)(1)1+2+3

计算(能简算的一定要简算)(1)1+2+3+4+5+6+7+8+7+6+5+4+3+2+1888888×888888(2)113×8+218×13+3113  

计算(能简算的一定要简算)(1)1+2+3+4+5+6+7+8+7+6+5+4+3+2+1888888×888888(2)113×8+218×13+3113

(1)

1+2+3+4+5+6+7+8+7+6+5+4+3+2+1 888888×888888


=

8×8 888888×888888


=

1 111111×111111


=

1 12345654321

(2)1

1 3×8

+2

1 8×13

+3

1 13×18

+4

1 18×23

+5

1 23×28

+6

1 28×33


=(1+2+3+4+5+6)+(

1 3

-

1 8

+

1 8

-

1 13

+

1 13

-

1 18

+

1 18

-

1 23

+

1 23

-

1 28

+

1 28

-

1 33

)×

1 5


=21+(

1 3

-

1 33

)×

1 5


=21+

10 33

×

1 5


=21+

2 33


=21

2 33

计算(能简算的一定要简算)113×8+218×13+3113×18+4118×23+5123×28+6128×33

1

1 3×8

+2

1 8×13

+3

1 13×18

+4

1 18×23

+5

1 23×28

+6

1 28×33


=(1+2+3+4+5+6)+

1 5

×(

1 3

-

1 8

+

1 8

-

1 13

+

1 13

-

1 18

1 28

-

1 33

),
=21+

1 5

×(

1 3

-

1 33

),
=21+

2 33


=21

2 33

88888X88888÷(1+2+3+4+5+6+7+8+7+6+5+4+3+2+1) 简算! 一定要简算

88888X88888÷(1+2+3+4+5+6+7+8+7+6+5+4+3+2+1)
=88888X88888÷64
=11111×11111
=123454321

计算(能简算的一定要简算) 1 2 + 2 2×3 + 3 2×3×4 +…+ 7, 计算(能简算的一定要简算)12+22×3+32×3×4+…+72×3×4×5×6×7×8

1 2 +

2 2×3

+

3 2×3×4

+…+

7 2×3×4×5×6×7×8


=

2-1 2

+

3-1 2×3

+

4-1 2×3×4

+…+

8-1 2×3×4×5×6×7×8


=

2 2

-

1 2

+

3 2×3

-

1 2×3

+

4 2×3×4

-

1 2×3×4

+…+

8 2×3×4×5×6×7×8

-

1 2×3×4×5×6×7×8


=1-

1 2

+

1 2

-

1 6

+

1 6

-

1 24

+

1 24

-…-

1 2×3×4×5×6×7×8


=1-

1 2×3×4×5×6×7×8


=1-

1 40320


=

40319 40320

计算,能简算的一定要简算.65.5+65.5×99 5 8 ×[1÷( 3 4 + 1 3 )]

①65.5+65.5×99,
=65.5×100,
=6550;

5 8

×[1÷(

3 4

+

1 3

)],
=

5 8

×[1÷(

9 12

+

4 12

)],
=

5 8

×[1÷

13 12

],
=

5 8

×

12 13


=

15 26

2 5

÷

3 4

÷

1 15


=

2 5

×

4 3

×15,
=8;

④3.68-0.82-0.18,
=3.68-(0.82+0.18),
=3.68-1,
=2.68;

⑤36×(

2 9

+

7 12

),
=36×

2 9

+36×

7 12


=8+21,
=29;

⑥2÷

2 3

-

2 3

÷2,
=2×

3 2

-

2 3

×

1 2


=3-

1 3


=2

2 3

脱式计算,能够简算的一定要简算. 3 8 ÷ [( 1 5 + 1 4 )×

3 8 ÷ [(

1 5

+

1 4

)×

3 8

],
=

3 8

÷

3 8

÷(

1 5

+

1 4

),
=1÷

9 20


=1×

20 9


=2

2 9

②4-

4 5

÷4-

4 5


=4-

4 5

×

1 4

-

4 5


=4-(

1 5

+

4 5

),
=4-1,
=3;

③9

1 4

+9.8+9.25×

1 5


=9.25×(9.8+0.2),
=9.25×10,
=92.5;

④25×(4×11)×7,
=(25×4)×(11×7),
=100×77,
=7700;

⑤(

1 12

+

3 5

)÷

1 60


=(

1 12

+

3 5

)×60,
=60×

1 12

+

简算大全 计算(能简算的一定要简算)(1)1+2+3+4+5+6+7+8+7+6+5+4+3+2+1888888×888888(2)113×8+218×13+3113
3 5

×60,
=5+36,
=41;

⑥101×120-83-37,
=101×120-(83+37),
=120×(101-1),
=120×100,
=12000.

计算(能简算的要简算)( 5 6 - 3 7 )×42 4 25 ÷[( 2 5

(1)(

5 6 -

3 7

)×42,
=

5 6

×42-

3 7

×42,
=35-18,
=17;

(2)

4 25

÷[(

2 5

+

1 3

)×

9 11

],
=

4 25

÷[

11 15

×

9 11

],
=

4 25

÷

3 5


=

4 15

(3)(

2 29

+

3 23

)×29×23,
=(

2 29

+

3 23

)×(29×23),
=

2 29

×(29×23)+

3 23

×(29×23),
=

2 29

×29×23+

3 23

×23×29,
=2×23+3×29,
=46+87,
=133;

(4)

5 6

÷[

1 6

÷(

3 4

-

2 3

)],
=

5 6

÷[

1 6

÷

1 12

],
=

5 6

÷2,
=

5 12

脱式计算,能简算的要简算.① 2 3 +( 5 6 - 3 4 )÷ 3 8

2 3 +(

5 6

-

3 4

)÷

3 8


=

2 3

+

1 12

÷

3 8


=

2 3

+

2 9


=

8 9

②32×40+450÷18,
=1280+25,
=1305;

9 20

÷

1 2

×(

2 5

+

4 5

),
=

9 20

÷

1 2

×

6 5


=

9 10

×

6 5


=

27 25

3 4

×

3 4

+

1 4

×0.75-75%,
=

3 4

×0.75+

1 4

×0.75-0.75,
=(

3 4

+

1 4

-1)×0.75,
=0×0.75,
=0;

⑤3.6-2.8+3.4-7.2,
=(3.6+3.4)-(2.8+7.2),
=7-10,
=-3.

  
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