3)632 1 4 17)5 12能簡便的簡便

時間 2021-10-26 14:07:27

1樓:匿名使用者

【1-(3/7+5/14)】÷1/7

=【1-(3/7+5/14)】*7

=1*7-(3/7+5/14)*7

=7-(3/7*7+5/14*7)

=7-(3+5/2)

=7-3-5/2

=4-5/2

=3/2

4×【(5/6+2/3)÷6】

=4×【(5/6+4/6)÷6】

=4×【3/2÷6】

=4×【3/2×1/6】

=4×1/4

=1(32×1/4+17)÷5/12

=(8+17)÷5/12

=25÷5/12

=25*12/5

=5*12=60

2樓:物理教與學

【1-(3/7+5/14)】÷1/7

=[1-(6/14+5/14)]÷1/7

=(1-9/14)÷1/7

=(14/14-9/14)÷1/7

=5/14÷1/7

=5/14x7

=5/2

4×【(5/6+2/3)÷6】

=4x[(5/6+4/6)÷6]

=4x(3/2÷6)

=4x(3/2x1/6)

=4x1/4

=1(32×1/4+17)÷5/12

=(8+17)÷5/12

=25÷5/12

=25x12/5=60

(1)(-1/42)÷(1/6-3/14+2/3-2/7)用簡便方法 (2)(-2007/5/6)

3樓:匿名使用者

(1)(-1/42)÷(1/6-3/14+2/3-2/7)

解:原式的倒數為(1/6-3/14+2/3-2/7)÷(-1/42)

=(1/6-3/14+2/3-2/7)×42

=1/6×(-42)-3/14×(-42)+2/3×(-42)-2/7×(-42)

=-7-(-9)+(-28)-(-12)

=2+(-28)-(-12)

=-26-(-12)

=-14

故原式=-1/14

(2)(- 2007/5/6)+(- 2006/2/3)+(- 1/1/2)+4000/3/4

解:(- 2007/5/6)+(- 2006/2/3)+(- 1/1/2)+4000/3/4

=【- 2007+(- 5/6)】+【-2006+(- 2/3)】+【-1+(- 1/2)】+(4000+3/4)

=【-2007+(-2006)+(-1)+4000】+【- 5/6+(- 2/3)+(- 1/2)+3/4】

=14+2.75

=16.75

(3)請你用4,-4,7,7這四個數運用加、減、乘、除、乘方、括號組成乙個結果等於24的數,並寫出過程。

解:-{7×[4÷7+(-4)]}

=-{7×[4/7+(-4)]}

=-[7×(- 24/7)]

=-(-24)

=24請問還有疑問嗎?如果沒有就請採納。

計算下面各題,能簡算的要簡算。 45×(3/5+5/9) 3/14÷【6/7×(1/3+1/4)】 (7/3+7/4-7/12)×6/7

4樓:匿名使用者

45×(3/5+5/9) = 45×8/9 = 40

3/14÷【6/7×(1/3+1/4)】= 3/14÷【6/7×12/7】= 3/14÷2 = 3/28

(7/3+7/4-7/12)×6/7 = 7/3×6/7+7/4×6/7-7/12×6/7 = 2+3/2-1/2 = 3

(2/3-5/9×3/5)÷7/16 =(2/3-1/3)÷7/16 = 1/3*16/7 = 16/21

1/9×3+1/9×5+1/9 = 3/9+5/9+1/9 = 9/9 = 1

7/8×3/7+7/8 = 3/8+7/8 = 10/8 = 5/4

(1/2+11/8×3/2)÷1/2 = (1/2+11/8×3/2)×2 = 1/2×2+11/8×3/2×2 = 1 + 33/8 = 41/8

(1/3+1/5+1/15)×15 = 1/3×15 +1/5×15+1/15×15 = 5+3+1 = 9

/14÷(1/3*6/7-1/14) 1/7+7/8*5/7-3/8 【1/2+(3/4-3/5)】÷7/10 簡便計算

5樓:雨之雪

9/14÷(1/3*6/7-1/14)=9/14÷(2/14-1/14)=9/14÷1/14=9/14*14=9

【1/2+(3/4-3/5)】÷7/10 =[1/2+(15/20-12/20)]÷7/10=(1/2+3/20)÷7/10

=13/20*10/7

=13/14

簡便方法 5/14除【6/7*(4/9+1/6)】 8/9除【(2/5+1/10)*4/3】

6樓:洛姣六高昂

5/14除【6/7*(4/9+1/6)】

=5/14÷[6/7×4/9+6/7×1/6]=5/14÷[8/21+1/7]

=5/14÷11/21

=15/22

8/9除【(2/5+1/10)*4/3】

=8/9÷[1/2*4/3]

=8/9÷2/3

=4/3

1/2-4乘以1/4除以4 5/14除以[6/7乘以(2/3+1/6)] 36乘以(2/9+1/4) 都要簡便演算法啊!

7樓:新野旁觀者

1/2-4乘以1/4除以4

=1/2-1/4

=1/4

5/14除以[6/7乘以(2/3+1/6)]=5/14÷【6/7×2/3+6/7×1/6】=5/14÷【4/7+1/7】

=5/14÷5/7

=5/14×7/5

=1/2

36乘以(2/9+1/4)

=36×2/9+36×1/4

=8+9=17

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

8樓:匿名使用者

第乙個題要是能寫清楚點就好了 感覺有點亂 不過按順序一一算能算出來

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

9樓:百度使用者

()*3/2=4/3,5/2÷()=5/4

5-(6/7÷3/14+3/16÷3/8)簡便3/4÷【(3/5-1/4)×3/7】簡便 5

10樓:匿名使用者

5-(6/7÷3/14+3/16÷3/8)=5-(4+1/2)

=5-4又2分之1

=1/2

3/4÷【(3/5-1/4)×3/7】

=3/4÷3/7÷(3/5-1/4)

=7/4÷(3/5-1/4)

=7/4÷7/20

=5這兩個都沒什麼簡算的

11樓:刷分的全家不舉

5-(6/7÷3/14+3/16÷3/8)=5-(4+1/2)

=5-4-1/2

=1/2

3/4÷【(3/5-1/4)×3/7】

=3/4÷(7/20x3/7)

=3/4÷3/20

=3/4x20/3=5

9/14÷(1/3*6/7-1/14) 1/7+7/8*5/7-3/8 【1/2+(3/4-3/5)】÷7/10 簡便計算

12樓:妙酒

9/14÷

(1/3*6/7-1/14)

=9/14÷(2/7-1/14)

=9/14÷3/14

=31/7+7/8*5/7-3/8

=1/7+5/8-3/8

=1/7+1/4

=4/28+7/28

=11/28

【1/2+(3/4-3/5)】÷7/10

=(0.5+0.75-0.6)÷0.7

=0.65÷0.7

=13/14

能簡便簡便計算

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