Addition -- Sums to 5
90 seconds
1
+ 1
0
1
2
3
4
5
2
+ 3
0
1
2
3
4
5
0
+ 1
0
1
2
3
4
5
0
+ 4
0
1
2
3
4
5
2
+ 2
0
1
2
3
4
5
3
+ 2
0
1
2
3
4
5
0
+ 0
0
1
2
3
4
5
5
+ 0
0
1
2
3
4
5
0
+ 2
0
1
2
3
4
5
2
+ 3
0
1
2
3
4
5
1
+ 1
0
1
2
3
4
5
0
+ 4
0
1
2
3
4
5
4
+ 1
0
1
2
3
4
5
1
+ 2
0
1
2
3
4
5
2
+ 2
0
1
2
3
4
5
0
+ 1
0
1
2
3
4
5
0
+ 4
0
1
2
3
4
5
0
+ 0
0
1
2
3
4
5
1
+ 1
0
1
2
3
4
5
0
+ 2
0
1
2
3
4
5
1
+ 3
0
1
2
3
4
5
4
+ 1
0
1
2
3
4
5
1
+ 0
0
1
2
3
4
5
2
+ 3
0
1
2
3
4
5
4
+ 0
0
1
2
3
4
5
2
+ 2
0
1
2
3
4
5
2
+ 0
0
1
2
3
4
5
1
+ 3
0
1
2
3
4
5
4
+ 1
0
1
2
3
4
5
1
+ 0
0
1
2
3
4
5
0
+ 2
0
1
2
3
4
5
1
+ 2
0
1
2
3
4
5
4
+ 0
0
1
2
3
4
5
0
+ 1
0
1
2
3
4
5
4
+ 1
0
1
2
3
4
5
3
+ 2
0
1
2
3
4
5
2
+ 2
0
1
2
3
4
5
1
+ 0
0
1
2
3
4
5
4
+ 0
0
1
2
3
4
5
0
+ 2
0
1
2
3
4
5
