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)

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

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