Question

今晚的数学作业，急急急

Answer 1

1. 13/2×2/3=13/3
(1)13/2-2/3=35/6
(3)13/2×(1-2/3)=13/6
(4)13/2×2/13=13/3
(5)13/2÷(1+1+2/3)×(1+2/3)=13/2÷8/3×5/3=39/16×5/3=65/16
(6)(13/2-2/3)÷2+2/3=35/6÷2+2/3=35/12+2/3=43/12

Answer 2

1. 用去5M

2. 还剩2.5M

3. 还剩5M

4. 还剩65/16M

5. 剩下35/12M

追问

式子怎么写

追答

13/2M*2/3=5M
13/2M-2/3M=35/6M
13/2M-13/2M*2/3=2.5M
13/2M-2/3=5M
设用去X剩下(1+2/3)X
X+(1+2/3)X=13/2M,X=39/16,(1+2/3)X=65/16M
(13/2M-2/3M)/2+2/3M=12/43M