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dw joined in and replied with this 5 years ago, 1 minute later, 8 minutes after the original post[^][v]#1,149,093
same and I don't even go like 64+6+X=100
Sheila LaBoof joined in and replied with this 5 years ago, 35 minutes later, 43 minutes after the original post[^][v]#1,149,105
For 100 minus a two digit number xy where x and y are each digits, just think of what plus x is 9 and what plus y is 10.
So 100 minus 64 is 36 because 6 needs 3 more to be 9 and 4 needs 6 more to be 10.