Question

Using each of the digits 1, 2, 3, and 4 once and only once, with the basic rules of arithmetic (+, -, ÷, x, and parentheses). I already have 3+2-1=4 and 4÷2+1=3. I need one more! please help!

Answer 1

3 +(2 -1) =4

Explanation:

Another method is

(2-1) + 3 = 4

1 + (4 ÷ 2) = 3

(3 +2) -1 =4

3 +(2-1) =4

( 3 + 2) - 4 = 1

3 + (2 -4) = 1