3.OA.8

Use various strategies to solve two-step word problems using the four operations (involving only whole numbers with whole number answers). Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding. (MP.1, MP.4)

Example Problems
Tony visited an arcade.

He paid
$5 for an entry pass plus $0.50 for each game he played.

His total cost was
$11.

Determine how many games,
, he played by writing and solving an equation.
Pastries are on sale.

Today each pastry costs
less than the normal price. Right now if you buy of them they will only cost you .

Determine the normal price of each pastry,
p, by writing and solving an equation.
Desmond hired a landscaper who charges a flat equipment fee of $80 plus $10 for each hour of work.

The total charge came to
$130.

Determine how many hours,
, the landscaper worked by writing and solving an equation.
Khan Academy Resources
Goblins

1-on-1 AI tutoring aligned to 3.OA.8. Instant help for students, real-time insights for teachers.

Used in classrooms by 100,000+ students at Baltimore County, Plano ISD, Deer Valley USD, KIPP, and districts nationwide.

Free for teachers, forever →