Question

Which expression is equivalent to 9(15)? A. 9(1 + 5) B. 9(10+ 5) C. 9(1 + 50) D. 9(10 + 50)

Answer 1

B. 9(10+5)
Because 10 plus 5 is fifteen

Answer 2

The equivalent expression to 9(15) is 9(10+5).
Based on PEMDAS (Parentheses, exponents, multiplication/division, addition/subtraction,) we know that we need to solve the parentheses first, and then multiply by nine (in this specific question). Because 10+5=15, we know that:
9(15)=9(10+5)