2.OA.1

Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, (e.g. by using drawings and situation equations and/or solution equations with a symbol for the unknown number to represent the problem.)

Example Problems
Jamal writes chapters of similar length. Each chapter has 26 pages.

Write an equation that represents how many pages (
) are in some number of chapters ().
Noah stacks the same number of plates in every stack. Each stack has 8 plates.

Write an equation that represents how many plates (
) are in some number of stacks ().
Sasha is collecting exactly 22 marbles. They collect black marbles and white marbles.

Write an equation that represents how many black marbles Sasha collects (
) if they collect white marbles.
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