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