Mystery Bureau › Grade 5 standards › 5.NBT.B.5
📘 Common Core · 5.NBT.B.5 · Grade 5
Eleven words, and every one of them is doing work. Fourth grade allowed area models and partial products; fifth grade names the standard algorithm and expects fluency in it. Two-digit by two-digit is the size where that matters, because the second partial product needs a placeholder zero — the single most common place fifth grade multiplication goes wrong.
Quoted verbatim from the Common Core State Standards for Mathematics. Nothing here is paraphrased.
| 5.NBT.B.5 | Fluently multiply multi-digit whole numbers using the standard algorithm. |
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In plain English: Multiply multi-digit whole numbers fluently using the standard algorithm.
Each one runs in the browser with no account and nothing stored. Five questions apiece.
Real output from the activities above — not written for this page, drawn from the same pools a student gets. The numbers are rebuilt on every attempt.
| 65 × 25 = ? | 1625 |
| 14 × 19 = ? | 266 |
| 57 × 24 = ? | 1368 |
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