如题所述
三十以内的加减法如下：
30-22=
12+17=
27-14=
22-3=
26-12=
21-6=
29-26=
11+18=
16-9=
13+16=
28-13=
8+19=
12+18=
20-3=
30-19=
20-15=
20-12=
15+15=
27-10=
23-8=
13-6=
9+15=
22-17=
18-9=
17-9=
11-3=
21-10=
24-13=
30-4=
23-5=
12-8=
25-8=
24-7=
20-14=
21-14=
28-12=
30-6=
13-5=
7+9=
23-9=
23-20=
22-18=
12+13=
22-20=
27-20=
7+8=
22-8=
19-10=
26-17=
13+13=
12+14=
22-11=
27-22=
29-18=
29-28=
29-27=
12-4=
28-25=
25-17=
24-11=
27-12=
21-5=
26-13=
8+9=
26-25=
26-14=
22-7=
30-18=
22-15=
22-14=
20-8=
27-19=
27-17=
20-2=
29-11=
22-12=
15-7=
12+12=
24-10=
24-22=
22-4=
20-13=
28-21=
14+14=
21-17=
214=
8+20=
22-5=
12-7=
23-12=
29-13=
14+15=
29-15=
11-2=
28-20=
26-8=
7+5=
30-9=
11+16=
29-22=
14-6=
9-3=
29-12=
20-18=
27-16=
26-18=
21-20=
29-16=
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