Doubles and Halves
2.OA.B.2
NameDate
Work out each answer.
1.5 + 5 =
2.10 + 10 =
3.10 − 5 =
4.3 + 3 =
5.7 + 7 =
6.12 − 6 =
7.20 − 10 =
8.2 + 2 =
9.6 + 6 =
10.16 − 8 =
LessonPrint · 2.OA.B.2 · Set 1 · free to copy for classroom use
Doubles and Halves is a free printable Grade 2 maths worksheet on the doubles facts and their inverses, aligned to Common Core standard 2.OA.B.2. It prints 10 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.
Set 1 of 25 · the same problems every time you open this link.
Next setAnswer key — Doubles and Halves
Set 1. Prints on its own sheet.
- 1.10
- 2.20
- 3.5
- 4.6
- 5.14
- 6.6
- 7.10
- 8.4
- 9.12
- 10.8
Questions about Doubles and Halves
What does the Doubles and Halves worksheet cover?
It practises the doubles facts and their inverses — 10 questions for Grade 2, all on Common Core 2.OA.B.2: Know addition and subtraction facts within 20 by heart. The instruction to pupils is “Work out each answer”, and the answer key follows on the next sheet.
Which Common Core standard does Doubles and Halves practise?
CCSS.MATH.CONTENT.2.OA.B.2 — 2.OA.B.2, in the Operations & Algebraic Thinking domain for Grade 2. The published standard reads: “Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.” The worksheet assesses that standard rather than a paraphrase of it.
What age or grade is this worksheet for?
Doubles and Halves is written for Grade 2, typically ages 7-8. It is one of the sheets on 2.OA.B.2, so it suits any pupil working at that standard — including older pupils revisiting it and younger ones working ahead.
Does Doubles and Halves come with an answer key?
Yes. All 10 answers are generated from the same problems as the questions, so the key cannot drift out of step with the sheet. It starts on a fresh sheet of paper, after the questions, so it is not handed out with the class by accident.
How many different versions of Doubles and Halves can I print?
25 — one per pupil, and all 25 ask different questions. Set 1 downloads the whole class as a single PDF. Every version is fixed to its own address, so a sheet printed today holds the same problems when you reopen it next week.
Is Doubles and Halves free to print and photocopy?
Yes. Doubles and Halves, its answer key and its 25 versions are free to print and photocopy for your own class, with no account, no email capture and no subscription at the download step. Please do not resell them or republish them as your own.
More practice for 2.OA.B.2
Know addition and subtraction facts within 20 by heart.
Last reviewed 2026-09-05. Aligned to 2.OA.B.2 of the Common Core State Standards for mathematics.