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