Wyoming Math 3.OA.8b
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. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.
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 stories into equations using addition, subtraction, multiplication, or division. They calculate in the right order and use mental math or rounding to check whether their answers make sense.
What Mastery Looks Like
- A student can explain why 4 × 6 + 5 equals 29, not 44. They can solve a two-step problem and use an estimate to catch an answer that is too high or too low.
Common Misconceptions
- Students may work from left to right even when multiplication or division comes after addition. They may add every number in a story or round before finding the exact answer.
How to Assess It
- Exit ticket: Six boxes hold 19 pencils each. The class gives away 24 pencils. How many remain? Write an equation, solve it, and round to check your answer.
Lesson moves
Ways to Teach It
Give pairs counters to build four groups of six and add five loose counters, then write and solve 4 × 6 + 5.
Ask, 'A class has 3 boxes of 8 markers and 7 loose markers. Why is 3 × 8 + 7 equal to 31, not 45?'
Play a matching game with story cards and equation cards, including '4 bags of 6 plus 5 loose' and '4 × 6 + 5.'
Use a mock receipt for three $19 notebooks and one $12 folder; find the total, then round the prices to check it.
Free download
Printable 3.OA.8b Worksheet
A ready-to-print activity worksheet aligned to 3.OA.8b, with an answer key for the teacher on its own page. No account needed.
PDF, US Letter, prints cleanly in black and white.
Download the worksheetKeep exploring
Related Standards
Turn this exact standard into a lesson
Grade, subject, topic, and the complete standard are prefilled. Create one free, no account needed.
Also for this standard:Make a WorksheetMake a QuizMake a Sub Lesson