7 - 2 - 3 - 12 = 7 - 17 = -10
10 nickels and 2 quarters
10 + 12 = 22
6*(8 + 10 - 7 - 9) = 6*(18 - 16) = 6*2 = 12
The first 5 from the seven take you to 10, with 2 still to go. So the answer is 10 +2 = 12
One example. 12*8+3+7-6 = 100 The key is finding sets of 10s
There are no words that contain all of these letters. The longest words you can make have 10 letters (from a total of 12). They are:ScamperingWingspread
7+9+10-6-8
There are 12 ways.
10/12/09
√(12 + 12 + 12) = √36 = 6
There are not 20 ways - there are only 12.
It is: 1.0*10^12