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Long Multiplication

Long Multiplication. Starter!. Write 3 Bullet Points: What do you know about Interior and Exterior angles? 1. 2. 3. Long Multiplication Objectives. All can do long multiplication Most can use two different methods to solve long multiplication questions

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Long Multiplication

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  1. Long Multiplication

  2. Starter! Write 3 Bullet Points: What do you know about Interior and Exterior angles? 1. 2. 3.

  3. Long MultiplicationObjectives • All can do long multiplication • Most can use two different methods to solve long multiplication questions • Some can estimate answers using long multiplication

  4. Multiply these numbers… 10 X 20 = 5 X 20 = 30 X 5 = 70 X 3 = 25 X 5 = 40 X 6 = 210 125 240 200 100 150 18 X 15 = 24 X 11 = 39 X 22 = 270 264 858

  5. Three Different Methods • 1. Grid method • 2. Diagonal method • 3. Long method

  6. 1. Grid Method • Work out 45 X 24 You try…! 1. 54 X 17 = 81 X 64 = 29 X 45 = 918 5184 1305 800 100 160 20 800 + 100 + 160 + 20 = 1080

  7. 2. Diagonal Method • Work out 45 X 24 You try…! 1. 27 X 82 = 53 X 21 = 96 X 63 = 2214 1113 6048

  8. Diagonal Method continues… • 452 X 371 167692

  9. 3. Long method… • Work out 45 X 24 4 5 X 2 4__ You try…! 1. 23 X 46 = 54 X 73 = 92 X 14 = 1058 3942 1288

  10. Long MultiplicationObjectives • All can do long multiplication • Most can use two different methods to solve long multiplication questions • Some can estimate answers using long multiplication

  11. WILT • 1. • 2. • What I am unsure about…. • 1.

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