? 發問時間： 藝術與人文詩詞與文學 · 1 0 年前

# 分數的問題實在是不懂怎麼寫~~~~急急急

Q1:5/6-3/5x(7/12+1/4)=

Q2:2 3/4x8/9-10/21÷1 3/7=

Q3:(7/10+4/5÷1/3)x3/4=

Q4:1/4+6÷3/4-1/2x1 1/4=

Q5:6/25x(2 1/3-4/5+2/15)=

Q6:6x{ (2 1/3-0.8)÷1/3 }=

Q7:4 1/5x11/35 ÷1 4/5-2/5=

Q8:(2-1/3)x4/5+5/6÷(2/3-1/4)=

Q9:11/17x{ (2/3)^3÷33/34 }÷1/3^2=

Q10:5^2x7^2x11/2x3^2x6÷5x7x13/2^2x3=

Q9的題目:(2/3)^3是三分之二的三次方

1/3^2是三的二次方之一

Q10的題目:5^2x7^2x11/2x3^2x6分析是這樣嘀~~

5x7x13/2^2x3是二的二次方乘三分之五乘七乘十三

### 1 個解答

• 1 0 年前
最佳解答

Q1:

5/6-3/5x(7/12+1/4)

=5/6-3/5x(7/12+3/12)

=5/6-3/5x10/12

=5/6-30/60

=5/6-1/2

=5/6-3/6

=2/6=1/3

Q2:

2 3/4x8/9-10/21÷1 3/7

=11/4x8/9-10/21÷10/7

=88/36-10/21x7/10

=22/9-1/3

=22/9-3/9

=19/9

Q3:

(7/10+4/5÷1/3)x3/4

=(7/10+4/5x3/1)x3/4

=(7/10+12/5)x3/4

=(7/10+24/10)x3/4

=31/10x3/4

=93/40

Q4:

1/4+6÷3/4-1/2x1 1/4

=1/4+6x4/3-1/2x5/4

=1/4+8-5/8

=2/8+7 8/8-5/8

=7 5/8

Q5:

6/25x(2 1/3-4/5+2/15)

=6/25x(7/3-4/5+2/15)

=6/25x(35/15-12/15+2/15)

=6/25x25/15

=6/15

Q6:

6x{ (2 1/3-0.8)÷1/3 }

=6x{ (7/3-8/10)÷1/3 }

=6x{ (70/30-24/30)x3 /1}

=6x{ 46/30x3 }

=6x46/10

=138/5

Q7:

4 1/5x11/35 ÷1 4/5-2/5

=21/5x11/35 ÷9/5-2/5

=21/5x11/35 x5/9-2/5

=11/15-6/15

=5/15

=1/3

Q8:

(2-1/3)x4/5+5/6÷(2/3-1/4)

=(6/3-1/3)x4/5+5/6÷(8/12-3/12)

=5/3x4/5+5/6÷5/12

=4/3+5/6x12/5

=1 1/3+2

=3 1/3

Q9:

11/17x{ (2/3)^3÷33/34 }÷1/3^2

=11/17x{ (8/27x34/33 }÷1/9

=11/7x8/27x34/33x9/1

=272/63

=4 20/63

Q10:

5^2x7^2x11/2x3^2x6÷5x7x13/2^2x3

=25x49x11/2x9x6÷5x7x13/4x3

=(25x49x11/2x9x6)x(4x3/5x7x13)

=(25x49x11x4x3)/(2x9x6x5x7x13)

=385/117

=3 34/117