Using a calculator well
Use a calculator efficiently and appropriately to solve multi-step addition, subtraction, multiplication and division problems, deciding when a calculator is the best tool and checking the result with an estimate
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1858 concepts · 9 subjects
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Using a calculator well means practising the idea at the table with counters or paper models and one clear check. We will demo once, then your child tries.
Materials: Small counters or grid paper; Paper and pencil. Adult models 3 × 4 as three groups of four, then writes the product. Child builds three multiplication examples as equal groups and records each product. Done: three correct products with groups matching the writing. Stop after the fresh check; keep optional challenge for another day.
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Primary supports Using a calculator well. An adult previews and guides; this is a learning page, not a scored quiz.
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Before you openAsk the learner one fact they learned and one question they still have.
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Public NRICH page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.
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Check understanding
- Use a calculator to total 1468 + 2975 + 813, or a shopping list such as $4.85 + $12.30 + $7.95 (reading the display as dollars and cents), and check the result against an estimate
- Decide whether to use mental strategies or a calculator for 400 x 3 and for 387 x 46, and explain the choice
- Spot that a calculator answer of 4 150 for 83 x 5 must be a keying error because 80 x 5 = 400
“When your child uses a calculator for homework, do they check the answer looks about right with a quick estimate — and know when it's faster to do it in their head?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Mathematical Thinking
- Age range
- Ages 8–11
Standards