Year 3 · Autumn term · Addition and subtraction · Step 20
Year 3 Estimate answers worksheets with answers
Round numbers to the nearest 10 or 100 to estimate answers, then work out the exact answer. A free editable Word sheet with eight fluency and six reasoning questions. The answers follow the questions: the same sheet again with every answer in red.
Download the worksheets
Printing tip: the red answers are in the same file, after the questions. For pupils, print only the pages before the red answers (in Word, choose the pages in the print box). Keep the full file for marking.
Print on A4 portrait: every page carries the sheet twice, side by side, so you can cut down the middle and two pupils each get a half to stick in their books. Every question sits in its own box and pupils write their answers in their book. The answers follow the questions in the file: the same sheet again with every answer in red. It opens in Word, Google Docs, Pages and LibreOffice, so you can change numbers, delete questions or add your own. There is no scaffolded version of this step yet.
Not scaffolded sheet
The same questions without the extra support. For pupils working at the expected standard: eight fluency questions first, then the reasoning questions.
Sample questions from this step
These are real questions from the first set of the sheet (two from the fluency page, two from the reasoning page). Open each one to see the answer.
- Round each number to the nearest 10 to estimate the answers.a) 197 + 256 (nearest 10) ≈ ____b) 292 + 323 (nearest 10) ≈ ____c) 260 + 357 (nearest 10) ≈ ____
Show the answer
460; 610; 620
- Round each number to the nearest 100 to estimate the answers.a) 484 − 371 (nearest 100) ≈ ____b) 144 − 131 (nearest 100) ≈ ____c) 558 − 43 (nearest 100) ≈ ____
Show the answer
100; 0; 600
- Is each calculation correct? Circle yes or no.a) 809 + 26 = 835Circle yes or no.b) 147 + 69 = 216Circle yes or no.c) 310 − 64 = 245Circle yes or no.
Show the answer
Yes; Yes; No
- I think of a number. I add 31, then I subtract 37. My answer is 327.What number did I think of? ____
Show the answer
333
What is on each sheet
- Fluency: eight questions that start easy and get harder, with the key skill of the step practised in different ways.
- Reasoning: questions with pictures, tables and number lines (spot the mistake, true or false and explain, puzzles with one answer, an open-ended task).
- Answers in the same file: the sheet again with every answer in red, so there is only one file to download.
- Boba characters give the instructions in speech bubbles. They are decoration only.
Why one set of questions?
- Everyone works on the same content, and support comes from scaffolds instead of different, easier tasks. This follows the mastery approach described by the NCETM and the thinking in Ofsted's 2021 mathematics research review.
- Worked examples and visual representations lighten the load for pupils who need it, as the Education Endowment Foundation describes.