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