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
1.81 - 8 = 73
2.17 + 6 = 23
3.7 + 0 - 3 = 4
4.0 + 6 - 2 = 4
5.0 + 1 - 9 = -8
6.15 + 9 = 24
7.46 - 8 = 38
8.90 + 8 = 98
9.29 - 8 = 21
10.67 + 9 = 76
11.6 + 2 - 5 = 3
12.38 - 2 = 36
13.87 + 1 = 88
14.14 - 2 = 12
15.83 - 2 = 81
16.1 + 0 - 0 = 1
17.68 + 2 = 70
18.13 + 10 = 23
19.34 + 3 = 37
20.6 + 0 - 3 = 3
21.5 + 4 - 1 = 8
22.85 + 3 = 88
23.10 + 10 = 20
24.0 + 9 - 2 = 7
25.78 - 8 = 70
26.17 - 3 = 14
27.18 + 9 = 27
28.18 + 10 = 28
29.1 + 5 - 2 = 4
30.19 + 5 = 24
31.57 - 2 = 55
32.0 + 1 - 1 = 0
33.72 + 3 = 75
34.12 + 4 = 16
35.10 + 1 = 11
36.9 + 0 - 2 = 7
37.43 + 6 = 49
38.83 + 6 = 89
39.6 + 2 - 9 = -1