Multiply Three Numbers is a free printable Grade 3 math worksheet on associativity — choosing which pair first, aligned to Common Core standard 3.OA.B.5. It prints 12 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.
3.OA.B.5
Work out each answer.
LessonPrint · 3.OA.B.5 · Set 1 · free to copy for classroom use
Set 1. Prints on its own sheet.
It practices associativity — choosing which pair first — 12 questions for Grade 3, all on Common Core 3.OA.B.5: Use known facts and patterns to work out harder ones. The instruction to students is “Work out each answer”, and the answer key follows on the next sheet.
CCSS.MATH.CONTENT.3.OA.B.5 — 3.OA.B.5, under Operations & Algebraic Thinking for Grade 3. The published standard reads: “Apply properties of operations as strategies to multiply and divide.” The worksheet assesses that standard rather than a paraphrase of it.
Multiply Three Numbers is written for Grade 3, typically ages 8-9. It is one of the sheets on 3.OA.B.5, so it suits any student working at that standard — including older students revisiting it and younger ones working ahead.
Yes. All 12 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 student, 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. Multiply Three Numbers, 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 — “Properties of Multiplication” is a 45-minute Grade 3 plan for 3.OA.B.5, timed section by section, with the misconceptions to expect and an exit ticket. Multiply Three Numbers is the practice that follows it.
Use known facts and patterns to work out harder ones.
Teaching this next? Properties of Multiplication is the 45-minute plan for it, with the misconceptions to expect.
Last reviewed 2026-09-05. Aligned to 3.OA.B.5 of the Common Core State Standards for Mathematics.