文档介绍:3+18=
18-5=
16-7=
4+12=
5+13=
17-6=
6+3=
11-4=
12+5=
11-2=
15+1=
19-11=
10+9=
16-7=
2+15=
16-15=
15+3=
1-2=
16-6=
14+1=
2+5=
11-8=
2+17=
2+10=
8+12=
14+3=
8-2=
17+1 =
11-9=
11-8=
2+17=
2+10=
8+12=
20-5=
18-13=
15-9=
18-15=
1+8=
19-14=
19-12=
20-13=
10+5=
18-6=
18-14=
14-8=
12-9=
11-8=
17+3=
1+3=
7+8=
8-7=
7-4=
2+5=
5-2=
14-3=
8+9=
7+12=
13-1=
9+3=
20-19=
5-1=
17-3=
12+2=
19-18=
20-15=
15-5=
12-3=
6+4=
19-8=
7+5=
18-11=
8+9=
10-4=
19-13=
3+1=
4+10=
2+3=
7+6=
8+9=
1+18=
3+15=
12-3=
19-12=
11+2=
7+4=
15-1 =
9-3=
15-5=
19-9=
17+2=
6+12=
10+1 =
11-5=
9+7=
15-1=
14+5=
2+11=
1+5=
6-1=
4+15=
4+4=
2+10=
17-3=
15+2=
7+10=
6-5=
18+2=
2+14=
4+7=
5+4=
13-4=
6+1 =
10-9=
19-11=
14+6=
2+18=
1+12=
16-8=
10-8=
13+3=
4-1 =
8+4=
1+9=
14-5=
8+1 =
4+4=
7+2=
16-2=
16+4=
8=3+11=19-11=1+17=
11=3+10=10-2=9-7=6+6=16+2=14-1 =2+14= 8-1=5+12=5+6= 4+11=5+2=3+11=8+7=4+4=6-2= 14-2=5+2= 4+12= 5+9=
计时(ﻩ)
4-1=
10+9=
5=
1+6=
14+1=
7+10=
8+11 =
1=
13=
2=
6+3=
6+8=
13=
2=
5+8=
13-2=
5+3=
9=
15-4=
9+6=
8-2=
1+2=
1+19=
14=
7+1=
10-8=17+3= 6+4=
6-5=
1=
14=
10=15-10=14-3=3+4=
2=
13=20-16=5+2=
6=
17=
4+14=
6=
11+2=
5+10=4-3=
11=4+12=9-8=
20-1=
13+3=14-13=12+6=
3+16= 20-1=
18-7= 20-4=4+9=
7=
5=7+8=4-2=
6+5= 14+1=10+9=
13-1=2+4=13-5=
10= 5+8=2+18=14+2= 20-7=5+10=
15=
4+12=
9-8=
5+10=
19-14=
14-3=
6+14=
4+16=
10-3=
10-2=
7-1 =
7+5=
5+10=
19-18=
6-3=
7+4=
14+6=
17-15=
4+15=
14-4=
15-2=
14-10=
16-13=
20-10=
5+2=
1+17=
13-1 =
9-1=
16-14=
4+5=
3+15=
9-2=
9+11=
10-5=
12+8=
2+1=
10-4=
1+8=
18-7=
19-7=
9+5=
3+4=
19-4=
14+5=
10+7=
14+6=
13+4=
17-6=
7+9=
12+4=
5+9=
15+2=
9+4=
18-4=
14-3=
4+6=
6+2=
19-5=
19-9=
2+14=
7+2=
17+3=
19-6=
4+10=
17-3=
20-8=
18-14=
9-5=
4+12=
5+6=
1+2=
18-5=
9+6=
3+1=
9+7=
6-3=
14-13=
3+11=
1+8=
19-11 =
16-4=
17-3=
10+3=
15-11=
1