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Formal Written Calculation Methods

Formal Written Calculation Methods. +. ÷. X. Expanded Column Addition. Complementary Addition. Grid Method 1. Bus Stop. Compact Column Addition. Decomposition. Grid Method 2. Bus Stop (with decimals). Compact Column (with decimals). Decomposition (with decimals). Grid Method

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Formal Written Calculation Methods

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  1. Formal Written Calculation Methods + ÷ X Expanded Column Addition Complementary Addition Grid Method 1 Bus Stop Compact Column Addition Decomposition Grid Method 2 Bus Stop (with decimals) Compact Column (with decimals) Decomposition (with decimals) Grid Method (with decimals) Chunking Expanded Column Weston Favell CEVA Primary School

  2. Expanded Column Addition 32 + 24 = 685 + 43 = 56 728 3 2 6 8 5 2 4 4 3 + + 6 8 1 2 0 5 0 6 0 0 5 6 7 2 8 Menu Weston Favell CEVA Primary School

  3. Compact Column Addition 32 + 24 = 685 + 43 = 56 728 3 2 6 8 5 2 4 4 3 + + 5 6 7 2 8 1 Menu Weston Favell CEVA Primary School

  4. Compact Column Addition (with decimals) 685.21 + 43.87 = 729.08 6 8 5 2 1 8 7 4 3 + 7 2 9 0 8 1 1 Menu Weston Favell CEVA Primary School

  5. Complementary Addition 755 - 87 = 668 7 5 5 8 7 - 3 (to make 90) 1 0 (to make 100) + 6 0 0 (to make 700) 5 5 (to make 755) 6 6 8 Menu Weston Favell CEVA Primary School

  6. Decomposition 372 - 47 = 372 - 87 = 325 285 16 2 6 12 6 12 3 7 2 3 7 2 4 7 8 7 - - 3 2 5 2 8 5 Menu Weston Favell CEVA Primary School

  7. Decomposition (with decimals) £9.42 - £6.78 = £2.64 13 8 3 12 £ 9 4 2 7 8 £ 6 - £ 2 6 4 Menu Weston Favell CEVA Primary School

  8. Grid Method 23 x 7 = 161 1 4 0 20 3 x 2 1 + 7 140 21 1 6 1 Menu Weston Favell CEVA Primary School

  9. Grid Method 362 x 24 = 8688 300 60 2 x 7240 20 40 6000 1200 + + = 1448 1200 240 8 4 + + + = 8 6 8 8 Menu Weston Favell CEVA Primary School

  10. Grid Method (with decimals) 36.5 x 73 = 2664.5 30 6 0.5 x 2555 70 35 2100 420 + + = 109.5 90 18 1.5 3 + + + = 2 6 6 4 .5 Menu Weston Favell CEVA Primary School

  11. Expanded Column Multiplication 362 x 24 = 8688 3 6 2 2 0 4 x 2 1 4 2 4 8 + 2 7 6 2 4 0 + 1 8 6 8 8 Menu Weston Favell CEVA Primary School

  12. Bus Stop 643 ÷ 7 = 84 ÷ 3 = 28 91 r6 0 9 1 6 2 8 r r r r 6 1 2 7 6 4 3 3 8 4 Menu Weston Favell CEVA Primary School

  13. Bus Stop (with decimals) 98 ÷ 8 = 87.5 ÷ 7 = 12.25 12.5 1 2 5 1 2 2 5 r r r r r 3 2 4 1 1 7 8 7 5 8 9 8 0 0 Menu Weston Favell CEVA Primary School

  14. Chunking 847 ÷ 7 = 121 8 4 7 7 0 0 ( 100 7 ) x - 1 4 7 1 4 0 ( 20 7 ) x - 7 7 ( 1 7 ) x + - 0 121 Menu Weston Favell CEVA Primary School

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