5年级500道计算题

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1/20+1/5＝
2/3-2/5＝
7/24+17/24＝
1/2-1/3＝
4/5+1/5＝

5/12-1/3＝
3/7-2/7＝
7/16+9/16＝
17/32-15/32＝
5/6-1/3＝

3/8+5/8＝
6/17-5/17＝
7/8-1/2＝
2/5-2/7＝
8/9+1/9＝

18/49-1/7＝
2/3-5/9＝
1/4-1/5＝
21/22-1/11＝
8/15-1/5＝
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%
1. (25%-695%-12%)*36
2. 3/4*3/5+3/4*2/5