SOLUTION: I need help solving this problem in my math textbook. Use the numbers 1, 2, 4, and 5 in any order to write expressions equal to each integer from 1 to 20.

Question 648840: I need help solving this problem in my math textbook. Use the numbers 1, 2, 4, and 5 in any order to write expressions equal to each integer from 1 to 20.
Answer by swincher4391(1107) (Show Source): You can put this solution on YOUR website!
2-1 = 1
4-2 = 2
4-1 = 3
5-1 = 4
4+1 = 5
5+1 = 6
5+2 = 7
5+2+1 = 8
4+5 = 9
2*5 = 10
1+(2*5) = 11
4*(2+1) = 12
(4*2)+5 = 13
(5*2) + 4 = 14
5 * (1+2) = 15
4^2 = 16
(5*4) - (1+2) = 17
(5*4) - (1*2) = 18
(5*4) - 1 = 19
(5*4) = 20
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