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Example, solutions, videos, and lessons to help Grade 5 students learn to write simple expressions that record calculations with numbers, and interpret numerical expressions without evaluating them.

For example, express the calculation “add 8 and 7, then multiply by 2” as 2 × (8 + 7). Recognize that 3 × (18932 + 921) is three times as large as 18932 + 921, without having to calculate the indicated sum or product.

Common Core: 5.OA.2

### Suggested Learning Targets

• I can use an expression to show a calculation described verbally.
• I can analyze expressions.

1) Alex and Chet both collect cards. Write an algebraic equation to show that Alex has twice as many cards as Chet.  Let c represent the number of cards Chet has.

2) Robin can bike 4 miles in one hour. Write an algebraic expression to show how many miles she can bike in h hours?

3 a) Lia works 7 hours a day for n days.
Write an expression that tells how many hours Lia works?

3 b) Gil has 7 baseballs in n bags. The same expression can be used for the number of baseballs Gil has. Use what you know about expressions to tell why this is true.

Writing and Interpreting Numerical Expressions, 5.OA.2

Writing Expressions that Record Calculations with Numbers 5-OA-A-2
This video demonstrates how to write expressions that record calculations. Constructing numerical expressions example
Examples:
Alan found four marbles to add to his 5 marbles currently in his pocket. He then had a competition with his friends and tripled his marbles. Write a numerical expression to model this situation without performing any operations. Translating words into algebraic expressions Translate Verbal Phrase Into Variable Expression Order of Operations with Parentheses, Brackets, and Braces Order of Operations with Parentheses, Brackets, and Braces Part 2 with Breakfast Cereal Analogy Order of Operations - A Word Problem Written as an Expression with Parentheses, Brackets, and Braces
This is a video walkthrough tutorial of an order of operations word problem written as an expression with parentheses, brackets, and braces.

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.