Do Parentheses Change the Meaning?

Do $2 + 3 \times 4$ and $(2 + 3) \times 4$ give the same result?

You do not need to finish the arithmetic — just think about which step the parentheses might change.

Without parentheses, multiplication comes first; with parentheses, whatever is inside them comes first.

$2 + 3 \times 4 = 14$, but $(2 + 3) \times 4 = 20$.

(1 + 4) × 2 等于多少？

Which part of $(1 + 4) \times 2$ do you compute first?

First the parentheses: $1 + 4 = 5$. Then $5 \times 2 = 10$.

When you see parentheses, first work out the expression inside them as a single number.

Parentheses first, then multiplication and division, then addition and subtraction.

(3 + 2) \times 5 = \_\_\_

(6 - 1) \times 3 = \_\_\_