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