数学是利用符号语言研究数量、结构、变化以及空间模型等概念的一门学科。以下是下班整理的关于20以内加减法混合练习题，希望大家认真阅读!
6+7+1= 2+4+2= 7-5-2=
6+4+9= 2+9+9= 8+6+4=
12-2-8= 5+5+8= 5+4+6=
20-8-9= 15-9-2= 5+7+4=
14-9-2= 19-6-7= 4+6+8=
18-1-9= 4+2+10= 19-3-6=
20-7-7= 8-3-5= 5+7+8=
4+7+9= 2+6+1= 10+8+1=
8+8+4= 17-7-5= 5+5+4=
15-5-10= 17-8-7= 16-4-4=
20-6-3= 1+7+2= 7+3+4=
16-1-3= 16-6-3= 19-10-5=
3+4+7= 1+6+5= 12-10-1=
19-2-9= 5+10+2= 14-2-5=
1+3+9= 19-4-3= 15-4-8=
7+2+3= 9-1-2= 9-3-6=
7-3-1= 11-9-2= 6+2+10=
3+5+9= 6+3+7= 18-5-7=
2+10+7= 2+7+10= 9+6+1=
8-2-3= 10-7-3= 8+5+3=
18-3-8= 3+6+6= 20-10-8=
15-2-9= 7+10+1= 9+2+4=
17-1-8= 7+6+4= 10+2+7=
15-2-2= 18-10-8= 6+6+5=
11-5-1= 6+10+2= 1+8+4=
12-1-6= 20-10-1= 20-5-8=
10-2-2= 3+9+1= 9-2-1=
5+1+10= 6+8+1= 17-3-7=
6+9+3= 10-3-6= 9+4+6=
16-5-1= 15-3-4= 3+5+2=
6+7+1= 2+4+2= 7-5-2=
6+4+9= 2+9+9= 8+6+4=
12-2-8= 5+5+8= 5+4+6=
20-8-9= 15-9-2= 5+7+4=
14-9-2= 19-6-7= 4+6+8=
18-1-9= 4+2+10= 19-3-6=
20-7-7= 8-3-5= 5+7+8=
4+7+9= 2+6+1= 10+8+1=
8+8+4= 17-7-5= 5+5+4=
15-5-10= 17-8-7= 16-4-4=
20-6-3= 1+7+2= 7+3+4=
16-1-3= 16-6-3= 19-10-5=
3+4+7= 1+6+5= 12-10-1=
19-2-9= 5+10+2= 14-2-5=
1+3+9= 19-4-3= 15-4-8=
7+2+3= 9-1-2= 9-3-6=
7-3-1= 11-9-2= 6+2+10=
3+5+9= 6+3+7= 18-5-7=
2+10+7= 2+7+10= 9+6+1=
8-2-3= 10-7-3= 8+5+3=
18-3-8= 3+6+6= 20-10-8=
15-2-9= 7+10+1= 9+2+4=
17-1-8= 7+6+4= 10+2+7=
15-2-2= 18-10-8= 6+6+5=
11-5-1= 6+10+2= 1+8+4=
12-1-6= 20-10-1= 20-5-8=
10-2-2= 3+9+1= 9-2-1=
5+1+10= 6+8+1= 17-3-7=
6+9+3= 10-3-6= 9+4+6=
16-5-1= 15-3-4= 3+5+2=
11-6-2= 1+5+8= 18-8-3= 17-4-4=
1+5+3= 8+1+10=
13-9-3= 1+9+6= 17-6-3= 20-9-6=
20-6-7= 16-5-5= 3+8+2=
20-4-8= 17-2-2= 1+10+7=
5+8+4= 19-7-1=
19-5-9= 14-6-7= 9+6+4= 19-8-5=
8+3+5= 13-1-7= 18-8-7= 10-4-2=
18-4-9= 12-5-3= 14-5-5= 3+10+4=
19-8-10= 18-9-9= 16-7-4= 3+2+5=
2+1+10= 9-4-3= 19-6-6= 9+2+8=
9-8-1= 10+5+2= 14-3-10= 15-7-2=
1+1+2= 10+1+1= 4-1-2= 13-5-6=
17-6-7= 15-6-3= 6+4+1= 12-4-4= 19-10-4=
7+5+1= 15-3-7= 12-6-4=
9+1+6= 20-9-10= 4+1+9= 4+3+8=
3+7+5= 5+6+2= 20-2-9= 17-7-9=
20-3-6= 11-2-9= 17-2-9= 16-9-6=
2+6+5= 3+9+5= 4+10+1= 1+9+10=
10-9-1= 17-8-6= 14-9-5= 8+7+1=
1+5+7= 2+3+9= 7-4-1= 1+3+8= 2+9+6=
8+5+7= 12-2-4= 20-6-2= 5+4+3=
20-8-6= 15-8-5= 5+6+9= 14-8-4=
14-3-6= 4+6+4= 6+3+1=
11-6-2= 1+5+8= 18-8-3= 17-4-4=
1+5+3= 8+1+10=
13-9-3= 1+9+6= 17-6-3= 20-9-6=
20-6-7= 16-5-5= 3+8+2= 20-4-8=
17-2-2= 1+10+7= 5+8+4= 19-7-1=
19-5-9= 14-6-7= 9+6+4= 19-8-5=
8+3+5= 13-1-7= 18-8-7= 10-4-2=
18-4-9= 12-5-3= 14-5-5= 3+10+4=
19-8-10= 18-9-9= 16-7-4= 3+2+5=
2+1+10= 9-4-3= 19-6-6= 9+2+8=
9-8-1= 10+5+2= 14-3-10= 15-7-2=
1+1+2= 10+1+1= 4-1-2= 13-5-6= 17-6-7=
15-6-3= 6+4+1= 12-4-4= 19-10-4=
7+5+1= 15-3-7= 12-6-4=
9+1+6= 20-9-10= 4+1+9= 4+3+8=
3+7+5= 5+6+2= 20-2-9= 17-7-9=
20-3-6= 11-2-9= 17-2-9= 16-9-6=
2+6+5= 3+9+5= 4+10+1= 1+9+10= 10-9-1=
17-8-6= 14-9-5= 8+7+1= 1+5+7=
2+3+9= 7-4-1= 1+3+8= 2+9+6=
8+5+7= 12-2-4= 20-6-2= 5+4+3=
20-8-6= 15-8-5= 5+6+9= 14-8-4=
14-3-6= 4+6+4= 6+3+1=
13-2-8= 7+7+2= 10+1+5= 19-5-6=
10+2+3= 13-9-3= 10-3-6= 18-7-7=
17-6-8= 5+8+1= 14-7-4= 3+7+2=
20-9-7= 19-6-3= 3+6+7= 7-5-2=
16-5-1= 4+1+6= 19-8-2= 2+10+8=
17-6-1= 12-6-5= 20-8-2= 17-4-2=
13-5-3= 18-10-8= 2+6+6= 16-5-6=
16-4-4= 9-6-3= 5+5+8= 16-6-10=
4+6+5= 10+7+1= 15-5-10= 8+2+4= 15-2-2=
10+1+9= 9-3-6= 20-10-1= 16-7-5=
15-7-3= 13-1-4= 20-2-5= 19-2-2=
7+6+1= 16-5-1= 5+3+2= 7+7+6= 6+1+6=
9-1-6= 11-5-1= 18-1-2= 5+7+1= 6+3+5=
6-4-1= 14-2-5= 11-4-1=
3+1+4= 10+1+2=
16-9-2= 3+10+5= 11-1-1= 10+2+8=
5+1+10= 17-9-5= 1+1+3= 1+3+2=
20-7-5= 1+3+5= 15-9-3= 12-7-2=
15-10-4= 7+2+4= 12-1-2= 11-4-4=
18-5-3= 19-8-2= 20-7-8= 17-8-3=
6+9+4= 12-8-4= 6-1-5= 3+7+5=
17-3-10= 18-2-7= 5+5+4= 17-2-1= 18-8-4= 3+6+7=
13-2-8= 7+7+2= 10+1+5= 19-5-6=
10+2+3= 13-9-3= 10-3-6= 18-7-7=
17-6-8= 5+8+1= 14-7-4= 3+7+2=
20-9-7= 19-6-3= 3+6+7= 7-5-2=
16-5-1= 4+1+6= 19-8-2= 2+10+8=
17-6-1= 12-6-5= 20-8-2= 17-4-2=
13-5-3= 18-10-8= 2+6+6= 16-5-6=
16-4-4= 9-6-3= 5+5+8= 16-6-10=
4+6+5= 10+7+1= 15-5-10= 8+2+4=
15-2-2= 10+1+9= 9-3-6= 20-10-1=
16-7-5= 15-7-3= 13-1-4= 20-2-5=
19-2-2= 7+6+1= 16-5-1= 5+3+2=
7+7+6= 6+1+6= 9-1-6= 11-5-1=
18-1-2= 5+7+1= 6+3+5= 6-4-1=
14-2-5= 11-4-1= 3+1+4= 10+1+2=
16-9-2= 3+10+5= 11-1-1= 10+2+8=
5+1+10= 17-9-5= 1+1+3= 1+3+2=
20-7-5= 1+3+5= 15-9-3= 12-7-2=
15-10-4= 7+2+4= 12-1-2= 11-4-4=
18-5-3=
19-8-2= 20-7-8= 17-8-3= 6+9+4=
12-8-4= 6-1-5= 3+7+5= 17-3-10=
18-2-7= 5+5+4= 17-2-1= 18-8-4= 3+6+7=
7+8+3= 16-3-5= 1+1+6= 16-5-9=
9-3-2= 1+4+2= 5-2-3= 10+3+3=
20-4-7= 13-2-9= 19-10-8= 14-7-4=
16-4-7= 5+7+4= 16-5-4= 20-5-9= 18-4-6=
4+8+8=
3+7+9= 12-6-1= 1+2+3= 8-4-1=
7+5+1= 5+8+4= 8-3-1= 17-5-2=
2+6+9= 9-5-3= 6+1+5= 5-1-3=
10+3+7= 4+8+8= 13-1-7= 10+1+5=
5+5+4= 9-8-1= 15-4-9= 8+6+4=
8+4+8= 3+2+9= 18-5-3= 8+10+1=
17-6-4= 1+10+4= 7+5+1= 20-5-9= 7+1+2=
1+7+3= 3+1+7= 13-3-6= 9+1+3=
7+6+4= 5+1+6= 12-2-4= 10-2-2=
20-2-1= 8+5+7= 18-2-7= 20-3-3=
18-9-6= 2+10+1= 4+1+8= 6-1-5=
18-6-5= 19-1-8= 2+4+3=
6+1+5= 4+1+1= 15-10-4= 1+6+6=
9+2+8= 16-10-3= 3+7+9= 1+7+10=
18-1-5= 5-1-3= 13-4-8= 13-7-3=
12-10-2= 15-2-10= 9+6+1= 6+2+6=
9+7+4= 20-9-7= 5+6+2= 5+3+5=
11-2-2= 13-2-9= 14-5-2= 9-5-2=
7+8+3= 16-3-5= 1+1+6= 16-5-9=
9-3-2= 1+4+2= 5-2-3= 10+3+3=
20-4-7= 13-2-9= 19-10-8= 14-7-4=
16-4-7= 5+7+4= 16-5-4= 20-5-9=
18-4-6= 4+8+8=
3+7+9= 12-6-1= 1+2+3= 8-4-1=
7+5+1= 5+8+4= 8-3-1= 17-5-2=
2+6+9= 9-5-3= 6+1+5= 5-1-3=
10+3+7= 4+8+8= 13-1-7= 10+1+5=
5+5+4= 9-8-1= 15-4-9= 8+6+4=
8+4+8= 3+2+9= 18-5-3= 8+10+1=
17-6-4= 1+10+4= 7+5+1= 20-5-9= 7+1+2=
1+7+3= 3+1+7= 13-3-6=
9+1+3= 7+6+4= 5+1+6= 12-2-4=
10-2-2= 20-2-1= 8+5+7=
18-2-7= 20-3-3= 18-9-6= 2+10+1=
4+1+8= 6-1-5= 18-6-5= 19-1-8= 2+4+3=
6+1+5= 4+1+1= 15-10-4=
1+6+6= 9+2+8= 16-10-3= 3+7+9=
1+7+10= 18-1-5= 5-1-3= 13-4-8=
13-7-3= 12-10-2= 15-2-10= 9+6+1=
6+2+6= 9+7+4= 20-9-7= 5+6+2= 5+3+5=
11-2-2= 13-2-9= 14-5-2= 9-5-2=
20-7-8= 6+3+4= 3+4+8= 17-9-1=
8-3-1= 10-4-6= 19-6-3= 7-4-1=
11-6-3= 17-8-3= 1+4+7= 10+3+3=
15-1-1= 10+8+1= 4+2+10= 15-3-7=
3+4+1= 2+9+5= 14-2-1= 6+5+7=
13-5-6= 8+1+10= 20-10-5= 9-3-3=
1+1+3= 5+1+7= 2+8+9= 6-2-1=
9+3+4= 17-10-6= 5+8+5= 15-9-4=
12-3-2= 9-4-4= 15-8-6= 1+9+10=
7+6+6= 16-4-1= 10-1-8= 15-2-6=
20-7-5= 1+3+5= 15-9-3= 12-7-2=
15-10-4= 7+2+4= 12-1-2= 11-4-4=
18-5-3= 19-8-2= 20-7-8= 17-8-3=
6+9+4= 12-8-4= 6-1-5= 3+7+5=
17-3-10= 18-2-7= 5+5+4= 17-2-1=
18-8-4= 3+6+7= 7+8+3= 16-3-5=
1+1+6= 16-5-9= 9-3-2= 1+4+2= 5-2-3=
10+3+3= 20-4-7= 13-2-9=
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