+ en - tot 20
1
2
3
4
5
1 + 1 =
0 + 1 =
3 + 2 =
4 - 2 =
1 + 3 =
5 - 4 =
5 - 2 =
3 - 1 =
5 - 0 =
4 + 0 =
2 + 1 =
4 + 1 =
1 / 6
Items in this lesson
1
2
3
4
5
1 + 1 =
0 + 1 =
3 + 2 =
4 - 2 =
1 + 3 =
5 - 4 =
5 - 2 =
3 - 1 =
5 - 0 =
4 + 0 =
2 + 1 =
4 + 1 =
Slide 1 - Drag question
10 + 0 =
10 + 1 =
10 + 2 =
10 + 3 =
10 + 4 =
10 + 5 =
10 + 6 =
10 + 7 =
10 + 8 =
10 + 9 =
10 + 10 =
20
10
14
18
11
15
19
13
16
12
17
Slide 2 - Drag question
14 + 6 =
Slide 3 - Open question
19 - 5 =
Slide 4 - Open question
20 - 11 =
Slide 5 - Open question
17 + 2 =
