- timed

SUBTRACTING

If you can add, you can subtract. Just say, " What can I add to the second number to give me the first number?" Your goal is 100% correct in 2 minutes. Use a timer to add pressure.

5-5	3-1	9-0	10-2	8-1	6-0	8-2	4-1	5-0
10-1	3-2	7-0	5-1	4-2	2-0	9-1	5-2	2-1
9-2	6-1	3-0	7-1	8-0	7-2	11-2	1-0	6-2
11-3	9-3	6-4	6-3	6-5	10-5	7-4	8-5	4-3
11-4	5-4	7-5	13-5	13-4	8-3	11-5	12-3	12-5
9-5	5-3	9-4	10-3	14-5	12-4	8-4	7-3	10-4
12-6	8-7	9-8	15-6	13-8	13-7	12-9	9-6	14-8
16-7	10-6	11-9	9-7	8-6	11-8	15-8	14-9	14-6
10-8	17-8	14-7	15-9	12-8	17-9	10-7	13-9	11-7
10-9	15-7	7-6	16-9	12-7	11-6	18-9	16-8	13-6