Mental strategies - adding three numbers less than 15

Mental strategies - adding three numbers less than 15
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  • Mental strategies - adding three numbers less than 15
  • Course: Mathematics
  • Grade: Year 4
  • Section: Number and place value
  • Outcome: Add three large numbers
  • Activity Type: Assessment
  • Activity ID: 3916

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Australia – Australian Curriculum expand/collapse

This activity is not included in Australia–Australian Curriculum

You can go to an overview of all the curricula here.

New Zealand – National Standards expand/collapse

  • 7 – Year 7
    • 7.NA – Number and algebra
      • 7.NA.1 – Apply additive and multiplicative strategies flexibly to whole numbers, ratios, and equivalent fractions (including percentages)

  • 5 – Year 5
    • 5.NA – Number and algebra
      • 5.NA.1 – Apply additive and simple multiplicative strategies and knowledge of symmetry to:

        • 5.NA.1.a – Combine or partition whole numbers

  • 6 – Year 6
    • 6.NA – Number and algebra
      • 6.NA.1 – Apply additive and simple multiplicative strategies flexibly to:

        • 6.NA.1.a – Combine or partition whole numbers, including performing mixed operations and using addition and subtraction as inverse operations

United Kingdom – National Curriculum expand/collapse

  • KS2 – Key Stage 2
    • KS2.Ma2 – Number and algebra
      • Knowledge, skills and understanding

        • Calculations

          • KS2.Ma2.3 – Pupils should be taught to:

            • Mental methods

              • KS2.Ma2.3.e – Work out what they need to add to any two-digit number to make 100, then add or subtract any pair of two-digit whole numbers; handle particular cases of three-digit and four-digit additions and subtractions by using compensation or other methods [for example, 3000 - 1997, 4560 + 998]

            • Written methods

              • KS2.Ma2.3.i – Use written methods to add and subtract positive integers less than 1000, then up to 10000, then add and subtract numbers involving decimals; use approximations and other strategies to check that their answers are reasonable

United States – Common Core State Standards expand/collapse

  • 2 – Grade 2
    • 2.NBT – Number & Operations in Base Ten
      • Mathematics

        • 2.NBT.6 – Add up to four two-digit numbers using strategies based on place value and properties of operations.

  • 3 – Grade 3
    • 3.NBT – Number & Operations in Base Ten
      • Mathematics

        • 3.NBT.2 – Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.

  • 4 – Grade 4
    • 4.NBT – Number & Operations in Base Ten (Grade 4 expectations in this domain are limited to whole numbers less than or equal to 1,000,000.)
      • Mathematics

        • 4.NBT.4 – Fluently add and subtract multi-digit whole numbers using the standard algorithm.