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Grade 5 Math · World 2: Multiplication Mountain · Level 17
Write an Expression
Turn a story into an expression, such as (3 × 10) + (4 × 6).
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 17
- An expression is math without an equal sign. It tells a story in numbers. 3 ten-packs of juice are 3 times 10.
- Georgia's example is a class party. One family brings 3 ten-packs of juice, and another brings 4 six-packs. Put each family in parentheses, then add.
- We'll stick to two operations. Say there are 4 packs with 5 red pens and 3 blue pens in each. Parentheses show that we find one pack first.
- You can read an expression without working it out. 4 times, in parentheses, 5 plus 3, is 4 times as much as 5 plus 3.
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.