Grade 5 1/2*4/9=2/9 Grade 6 1/2*4/5=2/5 Grade 6 completed more tasks.

3 (26-2)/( 1- 1/5*2)=40

4 40/ 1 1/ 15-( 1-3/5)= 120

5 34/( 1/30- 1/540)= 1080

6 (26-8)/82/ 1

7 5/( 1/3-7/24)= 120

8 ( 12/6)/60= 1/ 10

9 30/2*3/(3+2)=9 9*2/3=6

10 1/( 1/ 10- 1/ 15)=30 30- 15= 15()

1. use x meters.

3/5X+0.5= 18.5

3/5X= 18

x=30

2.4/9=20/45

4/5=36/45

20/45 is less than 36/45

So I finished reading a little more in the sixth grade.

The fifth grade completes 2/9 of the whole grade, and the sixth grade completes 2/5 of the whole grade.

3. Set the original X kilograms of oil.

1/5x + 1/5x-2=x-26

2/5x-2=x-26

-3/5 times =-24

x=40

4. Set the original X bucket

x-3/5x+40 = 1 1/ 15x

2/5x+40 = 1 1/ 15x

6/ 15x+40 = 1 1/ 15x

5/ 15x =40

x= 120

5. Suppose you withdraw X yuan.

1/30x- 1/540x=34

18/540x- 1/540x=34

17/540x=34

x= 1080

6.(26-8)/8=2.25=225%=4/9

7. Because intermediate books have not changed, intermediate books account for all 1/3.

Then the lower level is 1-7/24- 1/3=9/24.

9/24-7/24=5×2

1/ 12=5×2

A * * *10 ÷112 =120 (Ben)

8. 12 ÷2=6 (kg)

6÷60 =0. 1= 1/ 10

The answer is110.

9. If the length is x cm, the width is 2/3x.

(x+2/3X)×2=30

X=9

9×2/3=6 cm

6×9=54 (square centimeter)

10. 1-( 1/ 15× 10 )= 1/3

1/3÷ 10= 1/30

So b will take 30 days to complete.