Multiplying by 20

  • Multiplying by 20
  • Course: Mathematics
  • Grade: Year 7
  • Section: Number and place value
  • Outcome: Multiply by multiples of 10
  • Activity Type: Printable
  • Activity ID: 4212

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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:

            • Number operations and the relationships between them

              • KS2.Ma2.3.a – Develop further their understanding of the four number operations and the relationships between them including inverses; use the related vocabulary; choose suitable number operations to solve a given problem, and recognise similar problems to which they apply

            • Mental methods

              • KS2.Ma2.3.h – Multiply and divide, at first in the range 1 to 100 [for example, 27 x 3, 65 ÷ 5], then for particular cases of larger numbers by using factors, distribution or other methods

            • Written methods

              • KS2.Ma2.3.j – Use written methods for short multiplication and division by a single-digit integer of two-digit then three-digit then four-digit integers, then of numbers with decimals; then use long multiplication, at first for two-digit by two-digit integer calculations, then for three-digit by two-digit calculations; extend division to informal methods of dividing by a two-digit divisor [for example, 64 ÷ 16]; use approximations and other strategies to check that their answers are reasonable

Australia – Australian Curriculum expand/collapse

  • Year 5
    • Number and Algebra
      • Number and place value

        • ACMNA100 – Solve problems involving multiplication of large numbers by one- or two-digit numbers using efficient mental, written strategies and appropriate digital technologies

New Zealand – National Standards expand/collapse

  • 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 States – Common Core State Standards expand/collapse

  • 5 – Grade 5
    • 5.NBT – Number & Operations in Base Ten
      • Mathematics

        • 5.NBT.2 – Explain patterns in the number of zeros of the product when multiplying a number by powers of 10, and explain patterns in the placement of the decimal point when a decimal is multiplied or divided by a power of 10. Use whole-number exponents to denote powers of 10.

      • Mathematics

        • 5.NBT.5 – Fluently multiply multi-digit whole numbers using the standard algorithm.