How do you insert parentheses to make #18+2*1+3^2 =38 # true? Algebra Expressions, Equations, and Functions PEMDAS 1 Answer Costas C. Feb 27, 2016 #18+2*(1+3^2)# Explanation: #18+2*(1+3^2)=18+2*(1+9)=18+2*10=18+20=38# The #2*1# multiplication is suspicious, so just play with the parenthesis until the #*1# actually has a meaning. Answer link Related questions What is PEMDAS? How do you use PEMDAS? How do you use order of operations to simplify #3(7-2)-8#? What are common mistakes students make with PEMDAS? How do you evaluate the expression #5[8+(3-1)]-2#? How do you simplify the expression #4(30-(3+1)^2)#? How do you evaluate the expression #x^4+x# if x=2? Is it okay to add first before subtracting in #4-6+3#? How do you simplify #(-3)^2+12*5#? How do you simplify #(4-2)^3-4*8+21div3#? See all questions in PEMDAS Impact of this question 1953 views around the world You can reuse this answer Creative Commons License