80712507375用簡便方法計算

2021-03-03 21:29:50 字數 3435 閱讀 1750

1樓:

簡便方法計算

(8+0.7)×12.5+0.7×37.5=8.7×12.5+0.7×3×12.5

=8.7×12.5+2.1×12.5

=10.8×12.5

=10×12.5+0.8×12.5

=125+10

=135

2樓:匿名使用者

(8+0.7)×12.5+0.

7×37.5=8×12.5+0.

7×12.5+0.7×37.

5=100+0.7×(12.5+37.

5)=100+0.7×50

=135

3樓:匿名使用者

解:(8+0.7)×

12.5+0.7×37.5

=8×12.5+0.7×12.

5+0.7×37.5=8×12.

5+0.7×12.5+2.

1×12.5=(8+0.7+2.

1)×12.5

=10.8×12.5

=(10+0.8)×12.5

=10×12.5+0.8×12.5

=125+10

=135

遞等式計算(能簡便的用簡便方法).12.5×(0.7×0.8)70.8-0.8×0.513-3.79+6

4樓:百度使用者

(1)12.5×(0.7×0.8),

=12.5×0.8×0.7,

=10×0.7,

=7;(2)70.8-0.8×0.5,

=70.8-0.4,

=70.4;

(3)13-3.79+6.21,

=9.21+6.21,

=15.42;

(4)12.5×(40+0.7),

=12.5×8×5+12.5×0.7,

=500+8.75,

=508.75;

(5)4.12-1.78-1.22,

=4.12-(1.78+1.22),

=4.12-3,

=1.12;

(6)4.2÷0.7÷6,

=4.2÷(0.7×6),

=4.2÷4.2,=1.

12.5乘7.8乘0.8用簡便方法算

5樓:南方飛虹

=12.5×0.8×7.8

=10×7.8

=78如果我的回答能夠解決你的問題,希望你能夠採納我,如果有疑問繼續追問,衷心感謝你的支援

6樓:瑩星

12.5×7.8×0.8

=12.5×0.8×7.8

=10×7.8=78

用簡便方法計算下面的題:12.5✘8.7,2.5✘4.4-2.5✘0.4,5.24+5.24✘99

7樓:匿名使用者

(1)12.5×8.7 (根據125×8=1000)=12.5×(8+0.8-0.1)

=100+10-1.25

=109.75

(2)2.5×4.4-2.5×0.4 (逆用乘法分配律)=2.5×(4.4-0.4)

=2.5×4

=10(3)5.24+5.24×99 (逆用乘法分配律)=5.24×(1+99)

=5.24×100

=524

8樓:匿名使用者

12.5×8.7

=12.5×(8+0.8-0.1〉

=12.5×8+12.5×0.8-12.5×0.1=100+10-1.25

=108.75

9樓:邊然

12.5x8.7

=12.5ⅹ8+12.5x0.7

=100+8.75

=108.75

2.5x4.4-2.5x0.4

=2.5x(4.4-0.4)

=2.5x4

=105.24+5.24x99

=5.24x(1+99)

=5.24x100

=524

10樓:慢慢慢消磨

12.5x8.7=12.5x(8+0.8-0.1)=12.5x8+12.5x0.8-12.5x0.1=108.75

2.5x4.4-2.5x0.4=2.5x(4.4-0.4)=10

5.24+5.24x99=5.24x(1+99)=524

11樓:匿名使用者

解,12.5x8.7

=12.5x(8+0.8-0.1)

=12.5x8+12.5x0.8-12.5x0.1=100+10-1.25

=108.75

2.5x4.4-2.5x0.4

=2.5x(4.4-0.4)

=2.5x4

=105.24+5.24x99

=5.24x(1+99)

=5.24x100

=524

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

12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

用簡便方法計算0.8×99+99,12.7+12.5÷5,0.175÷0.25×0.4?

13樓:八戒你胖咯

0.8×99+99

=0.8×(100-1)+99

=80-0.8+99

=178.2

12.7+12.5÷5

=12.7+2.5

=15.2

0.175÷0.25×0.4

=0.7×0.4

=0.28

11 22 0 22 3300 330 4 4用簡便方法計算要用脫式

11 22 0.22 3300 330 4.4 11 22 22 33 33 44 11 22 22 33 33 2 22 11 33 66 22 110 22 2420 或 11 22 0.22 3300 330 4.4 11 22 22 33 33 44 11 33 22 33 44 44 22...

568568簡便方法,325687用簡便方法怎麼算

其簡便方法是 56 8 56 8 乘除運算按從前往後算 8 8 64 故其結果是64 原式 56 56 8 8 1 8 8 68 60 8 4 8 448 56 56 x 8x8 64 如果是bai 56 8 du 56 8 那zhi就是1 就相dao當於a a 1 如果是56 8 56 8 56 ...

800(25 8)簡便計算,800 (8 20)用簡便方法計算?

簡便計算 800 8 25 100 25 4 800 8 25 100 25 4 800 5 5 8 800 8 1 5 5 100 5 1 5 20 5 4。分解法 800 8 20 用簡便方法計算?簡便計算過程方法如下 解 800 8 20 800 8 20 100 20 5 800 8 20 ...