Count On by One and Two is a free printable Grade 1 maths worksheet on counting on one or two from a larger number, aligned to Common Core standard 1.OA.C.5. It prints 16 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.
1.OA.C.5
Work out each answer.
LessonPrint · 1.OA.C.5 · Set 1 · free to copy for classroom use
Set 1. Prints on its own sheet.
It practises counting on one or two from a larger number — 16 questions for Grade 1, all on Common Core 1.OA.C.5: Count on to add, and count back to subtract. The instruction to pupils is “Work out each answer”, and the answer key follows on the next sheet.
CCSS.MATH.CONTENT.1.OA.C.5 — 1.OA.C.5, in the Operations & Algebraic Thinking domain for Grade 1. The published standard reads: “Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).” The worksheet assesses that standard rather than a paraphrase of it.
Count On by One and Two is written for Grade 1, typically ages 6-7. It is one of the sheets on 1.OA.C.5, so it suits any pupil working at that standard — including older pupils revisiting it and younger ones working ahead.
Yes. All 16 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.
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.
Yes. Count On by One and Two, 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.
Yes — “Counting On and Counting Back” is a 40-minute Grade 1 plan for 1.OA.C.5, timed section by section, with the misconceptions to expect and an exit ticket. Count On by One and Two is the practice that follows it.
Count on to add, and count back to subtract.
Teaching this next? Counting On and Counting Back is the 40-minute plan for it, with the misconceptions to expect.
Last reviewed 2026-09-05. Aligned to 1.OA.C.5 of the Common Core State Standards for mathematics.