Grade 1 Mixed Operations Worksheets
Grade 1 mixed operations covers addition and subtraction within 20 on the same page, and fact families. The five sheets below take that work in five formats, and each comes in three versions with its own answer key.
What the grade 1 mixed operations sheets cover
Grade 1 mixed operations comes in five formats (problem counts in brackets): drill (20, straight practice), timed drill (60, timed fluency), missing number (24, find the blank), mixed review (16, mixed shapes), and word problems (12, stories). Set A uses numbers from 1 to 20, 18 column problems that regroup, and 24 fill-in blanks. Problem types: mixed addition and subtraction within 20, mixed facts within 10, and fact families. All five come as Sets A, B and C with answer keys, 132 problems per set from 12 to 60 a sheet. From the Set A drill, problem 7: "4 + 13" (answer 17). Common Core: 1.OA.1 and 1.OA.6.
Teaching notes: How to Teach Mixed Operations. Set other grade 1 mixed operations ranges in the worksheet generator.
Grade 1 Mixed Addition and Subtraction to 20
Straight practice, 20-40 problems.
Grade 1 Mixed Operations Timed Drill
Fact fluency, 50-100 problems, timer box on sheet.
Grade 1 Mixed Operations Missing Number
Solve for the blank in any position.
Grade 1 Equal Groups: Repeated Addition to 20
Assorted problem shapes from the operation.
Grade 1 Sharing Equally
Story problems in real-world contexts.
The drill has 20 problems, five of them regrouping (problem 7: "4 + 13"). The timed drill has 60 problems, thirteen of them regrouping (problem 21: "17 - 6"). The missing number has 24 problems, numbers to 19 (problem 9: "5 - 3 = ___"). The mixed review has 16 problems, small numbers throughout (problem 6: "5 groups of 2: 2 + 2 + 2 + 2 + 2"). The word problems has 12 problems, story problems (problem 5: "Share 9 blocks equally among 3 baskets. How many does each…").
Across the five sheets the generator draws on mixed addition and subtraction within 20, mixed facts within 10, and fact families. The pages are tagged to Common Core 1.OA.6 and 1.OA.1, and each tag links to the standards index.
Mixed operations continues at grade 2, grade 3, grade 4, grade 5, and grade 6, so a student who finishes the grade 1 sheets can move up without changing topic.
A useful order through these five grade 1 mixed operations sheets: drill first, then mixed review to check the method survives a change of shape, then the missing-number sheet, and the timed drill last as a fluency check.