简便计算:(2 15 5 8)2 3(

2020-11-26 10:38:59 字数 4113 阅读 3724

1楼:匿名用户

(2/3+4/15×5/8)÷2/3

=(2/3+4/15×5/8)×3/2

=2/3×3/2+4/15×5/8×3/2=1+1/2

=1又1/2

(5/7÷8+1/8)×16=5/7×1/8×16+1/8×16=10/7+2

=3又3/7

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2楼:匿名用户

(2/3+4/15×5/8)÷2/3

=(2/3+1/6)×3/2

=5/4

(5/7÷8+1/8)×16

=12/56×16

=24/7

3楼:匿名用户

(2/3+4/15×5/8)÷2/3

=(2/3+4*5/15/8)*3/2

=2/3*3/2+4*5*3/15/8/2=1+1/4

=5/4=1又1/4

(5/7÷8+1/8)×16

=(5/7+1)*16/8

=10/7+2

=3又3/7

【简算】 (3/4-2/3)÷1/5 4/5×7/8+7/8÷5 (1-8/15×3/4)÷3/5 (3/8+2/17)×8+1/17

4楼:新野旁观者

(3/4-2/3)÷1/5

=1/12ch35

=5/12

4/5×

7/8+7/8÷5

=(4/5+1/50×7/8

=1×7/8

=7/8

(1-8/15×3/4)÷3/5

=(1-2/5)×5/3

=3/5×5/3

=1(3/8+2/17)×8+1/17

=3/8×8+(16/17+1/17)

=3+1=4

34/15-(4/15+2/5) 2-3/8÷7/16-1/7 5/12÷8+1/8×7/12 2/3×8/5+1/3÷5/8 (1/4-1/20)×40

5楼:匿名用户

第一个题要是能写清楚点就好了 感觉有点乱 不过按顺序一一算能算出来

3/4×【(7/15-1/5)÷2/3】=3/4×3/2×(7/15-1/5)

=3/4×3/2×(7/15-3/15)

=3/4×3/2×4/15

= 3/10

3/5×(1/7+8/21÷2/3)=3/5×(1/7+4/7)=3/5×5/7=3/7

(2/3-3/4×1/3)÷5/4=(2/3-1/4)×4/5=2/3×4/5-1/4×4/5

=8/15-3/15

=5/15

=1/3

1/2-8/9÷5/6×3/16 =1/2-1/5=3/10

(5/12+1/9-3/8)×72 = 5/12×72 +1/9×72 -3/8 ×72

=30 +8-27

=5【1-(75%+1/12)】×3/2=【1-(3/4+1/12)】×3/2

=【1-5/6】×3/2

=1/6×3/2

=1/4

6楼:百度用户

()*3/2=4/3,5/2÷()=5/4

脱式计算,5/8×7+9÷8/5,15÷(2/3-1/5),6/5×2/15+2/15÷5/4?

7楼:妙酒

5/8×7+9÷

8/5,

=5/8x7+9x5/8

=(7+9)x5/8

=16x5/8

=1015÷(2/3-1/5)

=15÷(10/15-3/15)

=15÷7/15

=225/7

6/5×2/15+2/15÷5/4

=2/15x6/5+2/15x4/5

=2/15x(6/5+4/5)

=2/15x2

=4/15

要简便算法,过程 1:8/9×(9+3/4)-2/3 2:7/8÷2/3+7/8×1/2 3:4-2/5÷8/15-1/4

8楼:

1:8/9×(

9+3/4)-2/3=8/9×9+8/9×3/4-2/3=8+2/3-2/3=8 2:7/8÷2/3+7/8×1/2=7/8×3/2+7/8×1/2=7/8×(3/2+1/2)=7/8×2=7/4 3:4-2/5÷8/15-1/4=4-2/5×15/8-1/4=4-3/4-1/4=4-(3/4+1/4)=4-1=3 4:

7/8+2/3÷4/5+1/6=7/8+2/3×5/4+1/6=7/8+5/6+1/6=7/8+1=15/8 5: 6-5/12×9/10-13/8 =6-3/8-13/8=6-(3/8+13/8)=6-2=4 6: 4/5+5/8÷1/4+1/2=4/5+5/8×4+1/2=4/5+5/2+1/2=4/5+3=19/5 7:

2-8/9×3/4-1/3=2-2/3-1/3=2-(2/3+1/3)=2-1=1 10: 4/9+2/7+5/18÷1/2=4/9+2/7+5/18×2=4/9+2/7+5/9=4/9+5/9+2/7=1+2/7=9/7 11:4-8/15÷2/3-1/5=4-8/15×3/2-1/5=4-4/5-1/5=4-(4/5+1/5)=4-1=3 口算的,你回去检验下吧

9楼:匿名用户

8/9×(9+3/4)-2/32=8/9*9+8/9*3/4-1/16=8+(2/3-1/16)=8又29/48

10楼:匿名用户

7/8+2/3*5/4+1/6=7/8+5/6+1/6=15/8

11楼:含黙兮攸语

我x,这个还要简便方法。我砸觉得直接算就是最简便的、。、、

用简便算法:2/3一5/6×3/10+3/2,7/4÷(2/3+1/2)x4/5,8/15÷9+1

12楼:兖矿兴隆矿

2/3一5/6×3/10+3/2

=2/3-1/4+3/2

=(8-3+18)/12

=23/12

7/4÷(2/3+1/2)x4/5

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

=7/5*6/7

=1.2

8/15÷9+1/9x7/15

=1/15*(8/9+7/9)

=1/15*15/9

=1/9

[4一(3/4一3/8)]×4/29

=[4-3/8]*4/29

=29/8*4/29

=1/2

9/3×2/3+4/5÷8/7简便计算。

13楼:亍城疗钒

4/7÷8/3+3/7?3/8 =4/7x3/8+3/7x3/8 =(4/7+3/7)x3/8 =1x3/8 =3/8 5/8÷7/9+3/8÷7/9 =(5/8+3/8)÷7/9 =1÷7/9 =9/7 5/6?7/13+6/13÷6/5+5/6 =5/6x7/13+7/13x5/6+5/6 =5/6x(7/13+6/13+1) =5/6x2 =5/3

4/5×7/8+7/8÷5(简便计算) (1—8/15×3/4)÷3/5(简便计算) 1—5/8÷

14楼:温柔_黏喻勊

计算器1-5/8/25/28-3/10 = 0.69910714285714

计算器4/5*7/8+7/8/5 = 0.875

简便运算:1/5*8÷4/5 3/5+1/2*4/5 5/6÷2/3÷5/6 1-7/9÷7/8

15楼:匿名用户

1/5*8÷4/5

=(8/5)×(5/4)

=23/5+1/2*4/5

=3/5+2/5

=15/6÷2/3÷5/6

=(5/6)×(3/2)×(6/5)

=3/2

1-7/9÷7/8

=1-(7/9)×(8/7)

=1-8/9

=1/9

(简便计算1—,【简算】 (3/4-2/3)÷1/5 4/5×7/8+7/8÷5 (1-8/15×3/4)÷3/5 (3/8+2/17)×8+1/17

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