What does it mean for addition and subtraction to have the same precedence in order of operations? A student was given the problem (3 x 6) – 2 +6 and asked to evaluate. The student’s answer was 10, what did he do wrong?

Question

What does it mean for addition and subtraction to have the same precedence in order of operations?  A student was given the problem (3 x 6) – 2 +6 and asked to evaluate.  The student’s answer was 10, what did he do wrong?

aripotta · Answer

the student did (3 x 6) and -(2 + 6) which would be (18) - (8) = 10. but he/she should have done (3 x 6) and (-2 + 6) which would be (18) + (4) = 22