100到200道即可

1。(25%-695%-12%)*36 2。3/4*3/5+3/4*2/5 3。(1-1/4+8/9)/7/9 4 2/3+1/6/3/24+2/21 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 11 3^3-5 12 4^2-34% 13 3。25-315% 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%