Recognise and use factor pairs and commutativity in mental calculations

1. Use the pattern: 3 x 15 = 3 x 10 + 3 x 5
2. Divisible Lions: Highest common factor
3. A Matter of Factors: 40
4. Divide and multiply: 56 / 7
5. Divide and multiply: 63 / 9
6. Divide and multiply: 36 / 4
7. Use the pattern: 4 x 16 = 4 x 10 + 4 x 6
8. Use the pattern: 5 x 15 = 5 x 10 + 5 x 5
9. Use the pattern: 4 x 23 = 4 x 20 + 4 x 3
10. Use the pattern: 2 x 26 = 2 x 20 + 2 x 6
11. Use the pattern: 8x43 = 8x40 + 8x3
12. Use the pattern: 5 x 35 = 5 x 30 + 5 x 5
13. Use the pattern: 9x63 = 9x60 + 9x3
14. Use the pattern: 6x84 = 6x80 + 6x4
15. Use the pattern: 4x73 = 4x70 + 4x3
16. Use the pattern: 5x44 = 5x40 + 5x4
17. Use the pattern: 8x62 = 8x60 + 8x2
18. Use the pattern: 3x64 = 3x60 + 3x4
19. Use the pattern: 7x56 = 7x50 + 7x6
20. Use the pattern: 6x78 = 6x70 + 6x8