Mystery Bureau › Grade 4 standards › 4.NBT.B.4
📘 Common Core · 4.NBT.B.4 · Grade 4
This is the shortest standard in fourth grade place value and the most specific: the standard algorithm, fluently. Earlier grades allowed any place-value strategy; here the column method is named. At four digits the difficulty is entirely bookkeeping — keeping carries in the right column across three or four of them — which is why estimating first catches so many errors.
Quoted verbatim from the Common Core State Standards for Mathematics. Nothing here is paraphrased.
| 4.NBT.B.4 | Fluently add and subtract multi-digit whole numbers using the standard algorithm. |
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In plain English: Add and subtract 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.
| 4573 + 2072 = ? | 6645 |
| 1851 + 4591 = ? | 6442 |
| 1209 + 2630 = ? | 3839 |
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