elswartz08201 elswartz08201 01-10-2022 Mathematics Answered 12. What is the first step that should be performed to find the value of this expression? 150-23 (42-7)+31 Add 150+23. OMultiply 23 x 42. Add 7 +31. Subtract 42-7. 13: What is the value of the digit 8 in 2.846? (1 point)