Of course you must know the rules for order of operations to do these problems. PEMDAS (Please Excuse My Dear Aunt Sally) Parentheses, Exponents, Multiplication and/or Division, Addition and/or Subtraction.
1) 4x7+1 = 32 Per the rules, this would equal 28 + 1, or 29, To make it equal to 32, need to make the 7+1 = 8 first. Can do this with parentheses: 4x(7+1) = 32 or 4(7+1).
2) 6+8/2 = 7 This expression, as is, equals 6+4, or 10. To make it equal 7, need parentheses again:
(6+8)/2 = 7.
3) 5+7*2-2-12 = 5 This one doesn't need grouping symbols!! Per PEMDAS you need to multiply first before addition or subtraction, so you get 5+14-2-12 = 5.
9) 54/6*3+2*3+7=23. May need a few trials to figure this one out. Answer is 54/(6*3) + 2(3+7) = 23
54/18 = 3; 2*(3+7) = 2*(10) = 20; 3 + 20 = 23
See if you can do the others now.
