2.3/4*3/5+3/4*2/5

3.( 1- 1/4+8/9)/7/9

4 2/3+ 1/6/3/24+2/2 1

5 1*8/ 15*3/5

6 10-3/4/9/ 10- 1/6

7 [( 1/3+ 1/2)/5/6- 1/3]/ 1/7

8 2/3/5+3/5/2+3/4

9 1/[(2-2/3/ 1/2)]*2/5

10 3^2*3.25678

1 1 3^3-5

12 4^2-34%

13 3.25-3 15%

14 7^3+445%

15 12+5268.32-2569

16 123+456-52*8

17 45%+6325

18 1/2+ 1/3+ 1/4

19 789+456-78

20 45%+54%-36%

( 10/5)*( 18/ 13)

( 19/ 10)*( 12/5)

(5/2 1)*(5/ 17)

(2 1/ 19)*( 19/ 14)

( 19/20)*(22/8)

( 15/ 18)*( 10/ 14)

(3/ 19)*(5/8)

( 19/ 17)*(9/ 17)

( 15/7)*( 1 1/8)

( 15/2 1)*( 1 1/ 16)

(6/20)*(8/ 17)

(7/ 16)*( 18/ 16)

(4/ 14)*(3/ 15)

(5/20)*(22/20)

(5/ 18)*(6/23)

( 12/2 1)*(22/ 16)

(20/ 10)*( 14/ 13)

(4/7)*(20/20)

( 13/24)*( 17/20)

(4/ 17)*( 16/ 10)

1 125-997 =

998+ 1246+9989 =

(8700+870+87)÷87=

125×8.8 =

1.3+4.25+3.7+3.75=

17. 15-(3.5-2.85)=

3.4×99+3.4 =

4.8× 1.0 1 =

0.4×(2.5÷73) =

( 1.6+ 1.6+ 1.6+ 1.6)×25 =

12.3-2.45-5.7-4.55=

0. 125×0.25×64=

64.2×87+0.642× 1300=

25×(8×0.4)× 1.25 =

3.2×7÷3.2×7=

187.7× 1 1- 187.7=

3.8÷3.9+3.9÷0. 1+0. 1÷3.9 =

400÷ 125÷8=

1.9×4×0.5=

7.2÷8×4=

I hope I can help you. Please accept my answer.