1.OA.2

Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, by using objects, drawings and equations with a symbol for one unknown number to represent the problem. (MP.1, MP.4, MP.5)

Example Problems
Write an equation to describe this situation:
Larry read a
400-page book.
He read at a rate of
10 pages per day for days.
Write an equation to describe this situation:
Simone completed a
720-lap swimming challenge.
She swam
24 laps per day for days.
Write an equation to describe this situation:
Mia completed a
500-piece puzzle.
She worked at a rate of
25 pieces per day for days.
Goblins

1-on-1 AI tutoring aligned to 1.OA.2. 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 →