10以内的加减混合+10以内加减混合+11~20的加减法+20以内加法（进位）+2位数加1位数+2位数减1位数 口算题打印
1.8 + 1 - 6 = 3
2.9 + 5 - 1 = 13
3.15 + 6 = 21
4.32 + 4 = 36
5.15 + 1 = 16
6.6 + 0 - 9 = -3
7.62 - 6 = 56
8.9 + 5 - 3 = 11
9.6 + 5 - 5 = 6
10.7 + 0 - 0 = 7
11.19 + 3 = 22
12.15 + 7 = 22
13.15 - 3 = 12
14.56 + 1 = 57
15.2 + 6 - 6 = 2
16.4 + 2 - 1 = 5
17.0 + 3 - 0 = 3
18.28 + 5 = 33
19.95 - 7 = 88
20.88 - 0 = 88
21.77 - 6 = 71
22.17 + 9 = 8
23.31 - 2 = 29
24.55 + 2 = 57
25.75 + 5 = 80
26.59 + 6 = 65
27.2 + 4 - 0 = 6
28.3 + 2 - 3 = 2
29.3 + 8 - 9 = 2
30.3 + 6 - 1 = 8
31.0 + 2 - 0 = 2
32.17 + 10 = 27
33.55 + 9 = 64
34.18 + 2 = 20
35.11 - 0 = 11
36.60 - 5 = 55
37.11 + 9 = 20
38.71 - 8 = 63
39.29 + 8 = 37