Grade 1Addition & Subtraction

1.OA.A.1

Solve every kind of add/subtract story within 20 — including ones where the missing number is at the start.

Worksheets for this standard 1 topic

Addition & Subtraction Word Problems within 208 ways

The standard, officially

Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.* *See Glossary, Table 1.

Builds on

K.CC.C.6Compare groups: more, fewer, equal K.CC.C.7Compare two written numbers K.OA.A.2Solve add and subtract stories to 10

Leads to

1.OA.A.2Add three numbers within 20 1.MD.C.4Sort data and answer questions 2.OA.A.1Solve one- and two-step word problems