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