Evaluate Expressions

Work out two-operation expressions, and see how grouping changes the answer.

Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.

What children learn in Level 19

To evaluate an expression is to find its value. If there's a grouping symbol, that part goes first.
If there's no grouping symbol, multiply or divide before you add or subtract. Everyone follows this rule, so we all get the same answer.
See the difference? The same numbers gave 16 and 13. Always look before you start.
You can break numbers apart too. 15 times, in parentheses, 2 plus 10, is 15 times 12, which is 180.

Georgia's K-12 Mathematics Standards:

5.NR.5.1 — Write, interpret, and evaluate simple numerical expressions involving whole numbers with or without grouping symbols to represent actual situations.