Evaluate Expressions With Grouping Symbols Practice Test

A student is finding the value of ${25 - 3 \times(4 + 1)}$. Grouping symbols show which operations to do first (inside parentheses first, then brackets, then braces). What is the value of the expression?

A student writes two expressions: $8 \times(5 + 1)$ and $8 \times 5 + 1$. Grouping symbols show which operations to do first (inside the parentheses first). Which statement best explains how the parentheses change the value?