|
1.
4 – 1 =
1
3
|
2.
1 + 13 =
14
1
|
3.
20 – 20 =
0
2
|
4.
19 + 1 =
2
20
|
|
5.
7 + 4 =
1
11
|
6.
3 + 8 =
11
1
|
7.
3 + 8 =
11
1
|
8.
20 – 17 =
1
3
|
|
9.
3 + 12 =
1
15
|
10.
11 + 5 =
16
2
|
11.
11 + 9 =
20
2
|
12.
11 – 10 =
1
2
|
|
13.
9 + 10 =
2
19
|
14.
17 – 15 =
2
1
|
15.
20 + 0 =
20
2
|
16.
3 – 2 =
2
1
|
|
17.
3 + 11 =
14
1
|
18.
6 – 4 =
1
2
|
19.
15 + 5 =
2
20
|
20.
1 – 0 =
2
1
|
|
1.
4 – 1 =
1
3
|
2.
1 + 13 =
14
1
|
3.
20 – 20 =
0
2
|
4.
19 + 1 =
2
20
|
|
5.
7 + 4 =
1
11
|
6.
3 + 8 =
11
1
|
7.
3 + 8 =
11
1
|
8.
20 – 17 =
1
3
|
|
9.
3 + 12 =
1
15
|
10.
11 + 5 =
16
2
|
11.
11 + 9 =
20
2
|
12.
11 – 10 =
1
2
|
|
13.
9 + 10 =
2
19
|
14.
17 – 15 =
2
1
|
15.
20 + 0 =
20
2
|
16.
3 – 2 =
2
1
|
|
17.
3 + 11 =
14
1
|
18.
6 – 4 =
1
2
|
19.
15 + 5 =
2
20
|
20.
1 – 0 =
2
1
|