一道分数简便计算题:7-(,一道分数简便计算题:【8/7-(16/5-4/1)】X35/24 跪求,回答好了多给分 !!!

2021-01-14 08:27:56 字数 8908 阅读 6358

1楼:匿名用户

=(8/7-16/5+4)x35/24

=8/7x35/24-16/5x35/24+4x35/24=5/3-14/3+35/6

=17/6

=2又6分之5

2楼:新野旁观者

【8/7-(16/5-4/1)】x35/24=【8/7-16/1】x35/24

=16/13×35/24

=70/39

3楼:多么

根据公式(a-b)c=ac-bc得

原式=8/7×35/24-(16/5×35/24-4×35/24)=5/3-(14/3-6)=9

4楼:匿名用户

小括号里面直接求得-4/5,然后将大括号去了,乘8/7x35/24+4/5x35/24

7/13×4/5+6/13÷4/5 (7/24-3/16)÷1/8 7/13×4/5+6/13÷5/4简便运算 /是分数线

5楼:匿名用户

7/13×4/5+6/13÷4/5

=7/13*4/5+6/13*5/4

=2/13*(14/5+15/4)

=2/13*(14*4+15*5)/20

=2*(56+75)/13*20

=262/260

=131/130

(7/24-3/16)÷1/8

=(7/24-3/16)*8

=7/3-3/2

=14/6-9/6

=5/6

7/13×4/5+6/13÷5/4

=7/13*4/5+6/13*4/5

=4/5*(7/13+6/13)

=4/5*1

=4/5

6楼:天外飞仙

7/13×4/5+6/13÷4/5

=(7/13+6/13)*4/5

=1*4/5

=4/5

(7/24-3/16)÷1/8

=7/3-3/2

=(14-9)/6

=5/6

7/13×4/5+6/13÷5/4

= 7/13×4/5+6/13*4/5

=(7/13+6/13)*4/5

=1*4/5

=4/5

希望对你有帮助

祝你学业进步!(*^__^*)

7楼:郭明嘉

=3/5x15+1/3x15=9+5=14

简便计算: 1. 3.625÷5/32+6又2/5×3/8+6.4 2. 45÷5/8+1.6+4.4×1又3/5 3. 8/9×【3/4-(7/16-0.25)】

8楼:匿名用户

1. 3.625÷5/32+6又2/5×3/8+6.4=3.625×32/5+

6.4×3/8+6.4×1

=3.625×6.4+6.4×0.375+6.4×1=6.4×(3.625+0.375+1)

=6.4×5

=322. 45÷5/8+1.6+4.

4×1又3/5=45×8/5+1.6×1+4.4×1.

6=45×1.6+1.6×1+4.

4×1.6=1.6×(45+1+4.

4)=1.6×50.4

=1.6×(50+0.4)

=1.6×50+1.6×0.4

=80+0.64

=80.64

3. 8/9×【3/4-(7/16-0.25)】=8/9×【3/4-(7/16-1/4)】=8/9×【3/4-7/16+1/4】

=8/9×【3/4+1/4-7/16】

=8/9×【1-7/16】

=8/9×9/16

=1/2

4. 6.3×29又4/5+2.98×37=6.3×29.8+2.98×37

=63×2.98+2.98×37

=2.98×(63+37)

=2.98×100

=298

5. 3.6×31又2/5+314×0.

63+3.14=3.6×31.

4+314×0.63+3.14=36×3.

14+3.14×63+3.14×1=3.

14×(36+63+1)

=3.14×100

=314

6. 72×61又3/10+73.8*2又4/5=72×61.3+73.8×2.8

=72×61.3+(72×1.025×2.8)=72×61.3+72×(1.025×2.8)=72×61.3+72×2.87

=72×(61.3+2.87)

=72×64.17

=4620.24

7. 1/5+51/5+501/5+5001/5+50001/5=1/5+10又1/5+100又1/5+1000又1/5+10000又1/5

=(10+100+1000+10000)+(1/5+1/5+1/5+1/5+1/5)

=11110+1

=11111

9楼:妙酒

1. 3.625÷5/32+6又2/5×3/8+6.4=3又5/8x32/5+32/5x3/8+6.4=(3又5/8+3/8)x6.4+6.4

=4x6.4+6.4

=(4+1)x6.4

=5x6.4

=322. 45÷5/8+1.6+4.4×1又3/5=45x8/5+8/5+4.4x8/5

=(45+1+4.4)x8/5

=(50+0.4)x8/5

=50x8/5+0.4x8/5

=80+0.64

=80.64

3. 8/9×【3/4-(7/16-0.25)】=8/9x(3/4-7/16+1/4)

=8/9x(1-7/16)

=8/9x9/16

=1/2

4. 6.3×29又4/5+2.98×37=6.3x29.8+29.8x0.1x37=29.8x(6.3+3.7)

=29.8x10

=298

5. 3.6×31又2/5+314×0.

63+3.14=3.6x31.

4+31.4x10x0.63+31.

4x0.1=31.4x(3.

6+6.3+0.1)

=31.4x10

=314

6. 72×61又3/10+73.8*2又4/5=72x61.3+73.8x2.8

=4413.6+206.64

=4620.24

7. 1/5+51/5+501/5+5001/5+50001/5=1/5+10又1/5+100又1/5+1000又1/5+10000又1/5

=10000+1000+100+10+1/5x5=11111

10楼:围观者

1.原式=3.625*(32/5)+(32/5)*0.375+32/5=(32/5)*(3.625+0.375+1)=(32/5)*5=32

2.原式=45*(8/5)+8/5+4.4*(8/5)=(8/5)*(45+1+4.4)=80.64

3.原式=8/9 *(3/4-7/16+1/4)=8/9 * 9/16=1/2

4.原式=6.3*29.8+2.98*37=2.98*(63+37)=2.98*100=298

5.原式=3.6*31.4+314*0.63+3.14=3.14*(36+63+1)=3.14*100=314

6.题没抄错吧

7.原式=1/5+10+1/5+100+1/5+1000+1/5+10000+1/5=11111

五年级上册数学简便计算30道题及答案

11楼:阿维

1、24.6-3.98+5.4-6.02

解析:此题利用加法交换结合律,凑整再计算。步骤如下:

24.6-3.98+5.4-6.02

=(24.6+5.4)-(3.98+6.02)

=30-10

=202、27×17/26

解析:此题先用加法分配律,把27转换成(26+1),再利用乘法结合律,使得运算简便。

27×17/26

=(26+1)×17/26

=26×17/26+1×17/26

=17+17/26

=17又17/26

3、528-99

解析:利用凑整法和减法结合律计算,先利用凑整法把99变换为(100-1),再运用a-b-c=a-(b+c)来简便计算,步骤如下:

528-99

=528-(100-1)

=528-100+1

=428+1

=429

4、1.2×2.5+0.8×2.5

解析:运用提取公因数的方法,公式:ac+ab=a(b+c),提取公因数2.5,1.2和0.8相加正好凑整数,使得运算简便。

1.2×2.5+0.8×2.5

=(1.2+0.8)×2.5

=2×2.5

=55、2.96×40

解析:此题先利用乘法分配律,把2.96×40转换成29.6x4,再利用乘法结合律来简便计算。

2.96×40

=29.6x4

=(30-0.4)x4

=30×4+0.4×4

=120-1.6

=118.4

6、0.36 x 1.5 - 0.45

解析:此题运用乘法分配律,把0.45转换成1.5 x 0.3 ,即可提取公因数1.5,再根据乘法结合律进行简便计算。

0.36 x 1.5 - 0.45

= 0.36 x 1.5 - 1.5 x 0.3

=1.5 × (0.36 - 0.3)

=1.5 × 0.06

= 0.09

7、46×44/45

解析:此题先利用加法分配律把46转换成(45+1),再利用乘法结合律:(a×b)×c=a×(b×c)使得运算简便。

46×44/45

=(45+1)×44/45

=45×44/45+44/45

=44+44/45

=44又44/45

8、1.6×7.5×1.25

解析:此题利用乘法分配律把1.6,转化成2×0.8,再利用乘法结合律:(a×b)×c=a×(b×c)凑整,进行简便计算。

1.6×7.5×1.25

=2×0.8×7.5×1.25

=(2×7.5)×(0.8×1.25)

=15×1

=159、0.72×10.1

解析:此题先利用加法分配律,把10.1转换成10+0.1,再利用乘法结合律使得运算简便。

0.72×10.1

=0.72×(10+0.1)

=0.72×10+0.72×0.1

=7.2+0.072

=7.272

12楼:慕容家族创创大

公式1:a-b-c = a-(b+c)

10-0.432 -2.568

9.3-5.26-2.74

13.4-(3.4+5.2)

14.9-(5.2+4.9)

18.32-5.47-4.32

17.29-5.28-6.29

公式2:(axb)xc=ax(bxc)

25×6.8×0.04

0.25×32×0.125

6.4×1.25×12.5

公式3:c×(a+b)=ca+cb

0.45×201

0.58×10.1

50.2×99+50.2

4.7×9.9

3.28x5.7+6.72x5.7

2.1×99+2.1

1.7×9.9+0.17

23×0.1+2.3×9.9

0.18+4.26-0.18+4.26

0.58x1.3÷0.58x1.3

7.3÷4+2.7x0.25

3.75x0.5-2.75÷2

5.26x0.125+2.74÷8

公式4:a÷b÷c=a÷(b×c)

6.3÷1.8

4.2÷3.5

9.5÷(1.9 × 8)

12.8÷(0.4×1.6)

930÷0.6÷5

63.4÷2.5÷0.4

(7.7+1.54)÷0.7

(11.7+9.9)÷0.9

简便计算:

100-0.99

10.99+9.87

4.089÷0.047

0.24×390

6.9+4.8+3.1

0.456+6.22+3.78

15.89+(6.75-5.89)

4.02+5.4+0.98

5.17-1.8-3.2

13.75-(3.75+6.48)

3.68+7.56-2.68

7.85+2.34-0.85+4.66

35.6-1.8-15.6-7.2

3.82+2.9+0.18+9.1

9.6+4.8-3.6

7.14-0.53-2.47

5.27+2.86-0.66+1.63

13.35-4.68+2.65

73.8-1.64-13.8-5.36

47.8-7.45+8.8

0.398+0.36+3.64

15.75+3.59-0.59+14.2566.86-8.66-1.34

0.25×16.2×4

(1.25-0.125)x8

3.6x102

3.72x3.5+6.28x3.5

36.8-3.9-6.1

4.8×7.8+78×0.52

32+4.9-0.9

4.8×100.1

56.5×9.9+56.5

7.09x10.8-0.8x7.09

25.48-(9.4-0.52)

4.2÷3.5

320÷1.25÷8

18.76×9.9+18.76

3.52÷2.5÷0.4

3.9-4.1+6.1-5.9

5.6÷3.5

9.6÷0.8÷0.4

4.2×99+4.2

17.8÷(1.78×4)

0.49÷1.4

1.25×2.5×32

3.65×10.1

15.2÷0.25÷4

0.89×100.1

146.5-(23+46.5)

3.83×4.56+3.83×5.44

4.36×12.5×8

9.7×99+9.7

27.5×3.7-7.5×3.7

8.54÷2.5÷0.4

0.65×101

3.2×0.25×12.5

7.2×0.2+2.4×1.4

8.9×1.01

7.74×(2.8-1.3)+1.5×2.263.9×2.7+3.9×7.3

18-1.8÷0.125÷0.8

12.7×9.9+1.27

21×(9.3-3.7)-5.6

15.02-6.8-1.02

5.4×11-5.4

2.3×16+2.3×23+2.3

9.43-(6.28-1.57)

3.65×4.7-36.5×0.37

46×57+23×86

13.7×0.25-3.7÷4

2.22×9.9+6.66×6.7

101×0.87-0.91×87

10.7×16.1-15.1×10.7

0.79×199

4.8+8.63+5.2+0.37

5.93+0.19+2.81

1.76+0.195+3.24

2.35+1.713+0.287+7.651.57+0.245+7.43

6.02+3.6+1.98

0.134+2.66+0.866

1.27+3.9+0.73+16.1

7.5+4.9-6.5

3.07-0.38-1.62

1.29+3.7+2.71+6.3

8-2.45-1.55

3.25+1.79-0.59+1.75

23.4-0.8-13.4-7.2

0.32×403

3.2+0.36+4.8+1.64

1.23+3.4-0.23+6.6

0.25×36

12.7-(3.7+0.84)

36.54-1.76-4.54

0.25×0.73×4

7.6×0.8+0.2×7.6

0.85×199

0.25×8.5×4

1.28×8.6+0.72×8.6

12.5×0.96×0.8

10.4-9.6×0.35

0.8×(4.3×1.25)

3.12+3.12×99

28.6×101-28.6

0.86×15.7-0.86×14.7

2.4×102

2.31×1.2×0.5

14-7.32-2.68

2.64+8.67+7.36+11.33

70÷28

(2.5-0.25)×0.4

9.16×1.5-0.5×9.16

3.6-3.6×0.5

63.4÷2.5÷0.4

4.9÷1.4

3.9÷(1.3×5)

(7.7+1.54)÷0.7

2.5×2.4

2.7÷45

15÷(0.15×0.4)

0.35×1.25×2×0.8

32.4×0.9+0.1×32.4

15÷0.25

可能有疏忽,请多多包涵!(ω)