Wyoming Math 3.OA.8a
The Standard
Solve two-step word problems (limited to the whole number system) using the four basic operations. Students should apply the Order of Operations when there are no parentheses to specify a particular order. Represent these problems using equations with a symbol standing for the unknown quantity.
2023 Wyoming Mathematics Content and Performance Standards · Solve problems involving the four operations, and identify and explain patterns in arithmetic.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students turn two-step word problems into equations with a box for the unknown. They solve with whole numbers, using multiplication or division before addition or subtraction when there are no parentheses.
What Mastery Looks Like
- For 18 cookies shared among 3 students, then 2 eaten by one student, they write 18 ÷ 3 − 2 = □ and get 4. They explain why division comes first.
Common Misconceptions
- Students may solve 5 + 3 × 4 from left to right and get 32. They may solve only the first part of a story or leave the unknown out of their equation.
How to Assess It
- Ask: Four boxes hold 6 markers each. You find 5 more markers. How many markers do you have? Write an equation with □ and solve it.
Lesson moves
Ways to Teach It
Give students 26 counters and 4 cups. Have them share 24 counters equally, add 2 to one cup, and write an equation.
Ask: Mia says 5 + 3 × 4 = 32. Is she right? Explain using a story about stickers.
Play equation match with story, equation, and answer cards, including 20 − 12 ÷ 3 = □.
Price three $4 tickets and a $2 bus fee. Write 3 × 4 + 2 = □ and find the total.
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Printable 3.OA.8a Worksheet
A ready-to-print activity worksheet aligned to 3.OA.8a, with an answer key for the teacher on its own page. No account needed.
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Related Standards
- 7.EE.4b
Write and solve multi-step linear equations that include the use of the Distributive Property and combining like terms. Exclude equations that contain variables...
- 4.OA.3a
Represent these problems using equations with a letter standing for the unknown quantity.
- 6.EE.6
Use variables to represent unknown numbers and write expressions when solving a real-world or mathematical problem.
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