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Chinese Multiplication

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Presentation on theme: "Chinese Multiplication"— Presentation transcript:

1 Chinese Multiplication
Also known as: The Lattice Method

2 6 × 37 Draw grid Draw lattice

3 6 × 37 3 7 6

4 7×6 6 × 37 3 7 4 6 2

5 6 × 37 3 7 3×6 1 4 6 8 2

6 Add diagonals 6 × 37 3 7 1 4 6 8 2

7 Add diagonals 6 × 37 3 7 1 4 6 8 2 2

8 Add diagonals 6 × 37 3 7 1 4 6 8 2 1 2 2

9 Add diagonals 6 × 37 3 7 1 4 6 2 8 2 1 2 2

10 6 × 37 3 7 1 4 6 2 8 2 1 2 2 Read off answer

11 Chinese Multiplication
Now with some bigger numbers

12 46 × 37 Draw grid Draw lattice

13 46 × 37 4 6 3 7

14 6×3 46 × 37 4 6 1 3 8 7

15 46 × 37 4 6 1 3 8 6×7 4 7 2

16 46 × 37 4 6 4×3 1 1 3 2 8 4 7 2

17 46 × 37 4 6 1 1 3 2 8 4×7 2 4 7 8 2

18 46 × 37 4 6 Add diagonals 1 1 3 2 8 2 4 7 8 2

19 46 × 37 4 6 1 1 3 2 8 2 4 7 8 2 2

20 46 × 37 4 6 8+4+8=20 1 1 3 2 8 2 4 7 2 8 2 2

21 46 × 37 4 6 =7 1 1 3 2 8 2 4 7 2 8 2 7 2

22 46 × 37 4 6 1 1 3 1 2 8 2 4 7 2 8 2 7 2

23 46 × 37 = 1702 4 6 1 1 3 1 2 8 2 4 7 2 8 2 7 Read off answer 2

24 Now you try – choose some of these.
42 x 6 56 x 24 7 x 84 327 x 41 234 x 8 76 x 35 23 x 85 Check your answers on a calculator


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