secrets-of-mental-math-malestrom

148
Secrets of Mental Math
Here’s how we do it:
Step 1.
6 1 6
Step 2.
Step 3.
Step 4.
Step 5.
Step 6.
Step 7.
Step 8.
Step 9.
(6 5) (1 1) 31
3 (6 4) (2 1) (1 5) 34
3 (6 9) (5 1) (1 4) (2 5) 76
7 (6 2) (7 1) (1 9) (5 5) (2 4) 68
6 (6 8) (5 1) (1 2) (7 5) (2 9)
(5 4) 134
13 (6 6) (5 1) (1 8) (5 5) (2 2)
(7 4) (5 9) 164
16 (6 6) (2 1) (1 6) (5 5) (2 8)
(5 4) (5 2) (7 9) 194
19 (6 7) (4 1) (1 6) (2 5) (2 6)
(5 4) (5 8) (5 9) (7 2) 212
Step 10. 21 (6 2) (4 1) (1 7) (4 5) (2 6)
(2 4) (5 6) (5 9) (7 8) (5 2) 225
Step 11. 22 (1 2) (4 5) (2 7) (4 4) (5 6)
(2 9) (7 6) (5 2) (5 8) 214
Step 12. 21 (2 2) (4 4) (5 7) (4 9) (7 6)
(2 2) (5 6) (5 8) 228
Step 13. 22 (5 2) (4 9) (7 7) (4 2) (5 6)
(2 8) (5 6) 201
Step 14. 20 (7 2) (4 2) (5 7) (4 8) (5 6)
(2 6) 151
Step 15. 15 (5 2) (4 8) (5 7) (4 6) (2 6) 128
Step 16. 12 (5 2) (4 6) (2 7) (4 6) 84
Step 17. 8 (2 2) (4 6) (4 7) 64
Step 18. 6 (4 2) (4 7) 42
Step 19. 4 (4 2) 1
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