1. Adding

2. 1 5 6 +2 3 2 3 0 01 0 0 + 200 5 0 + 3 08 0 6 + 28 3 8 8 Adding by Partitioning Vertically

3. 2 3 7 8 +1 1 4 9 3 0 0 0 4 0 0 1 1 0 3 5 2 7 1 7 2 3 7 8 +1 1 4 9 7 1 2 1 53 Partitioning Vertically Formal Written Method

4. 4 5 7 8 +2 3 4 9 6 0 0 0 8 0 0 1 1 0 6 9 2 7 1 7 4 5 7 8 +2 3 4 9 7 1 2 1 96 Partitioning Vertically Formal Written Method

5. 4 6 8 7 +5 7 4 9 9 0 0 0 1 3 0 0 1 2 0 1 0 4 3 6 1 6 4 6 8 7 +5 7 4 9 6 1 3 1 Partitioning Vertically Formal Written Method 4 1 1 0

6. Subtracting

7. Subtraction by adding on. 502 - 198 198 +2 200500 +300 502 +2 = 304 502 - 198 2(to 200) 300 (to 500) (to 502)2 304

8. Subtraction by adding on. 613 - 279 279 +1 280300 +20 600 +300 = 334 613 - 279 1(to 280) 20(to 300) (to 600)300 334 +13 613 13(to 613)

9. Subtraction by adding on. 846 - 458 458 +42 500800 +300 846 +46 = 388 846 - 458 42(to 500) 300(to 800) (to 846)46 388

10. Subtraction by adding on. 2645 - 898 898 +2 9001000 +100 2000 +1000 = 1746 2645 - 898 2(to 900) 100(to 1000) (to 2000)1000 1746 +645 2645 645(to 2645)

11. Subtraction by adding on. 3567 - 742 742 +58 8001000 +200 3000 +2000 = 2825 3567 - 742 58(to 800) 200(to 1000) (to 3000)2000 2825 +567 3567 567(to 3567)

12. Subtraction by adding on. 3879 - 1352 1352 +48 14002000 +600 3000 +1000 = 2525 3879 - 1352 48(to 1400) 600(to 2000) (to 3000)1000 +879 3879 879(to 3879) 5 1 2 1 5 1 2

13. Subtraction by adding on. 6457 - 2469 2469 +31 25003000 +500 6000 +3000 = 3988 6457 - 2469 31(to 2500) 500(to 3000) (to 6000)3000 +457 6457 457(to 6457) 8 8 9 3

14. Subtraction by adding on. 5021 - 1989 1989 +1 19902000 +10 3000 +1000 4000 +1000 5000 +1000 = 3032 3000 30 2 Th H T U +20 5020 +1 5021

15. Subtraction by adding on vertically 6008 - 2997 3(3000) 3000 (6000) (6008)8 3011

16. Subtraction by adding on vertically 5003 - 1989 11(2000) 3000 (5000) (6008)3 3014

17. 5 2 3 9 - 1 5 6 7 3(1570) 3 0 (1600) (2000) 4 0 0 3 2 3 9(5239) 3 1 563

18. 5 2 3 9 - 1 5 6 7 2 11 7 41 63

19. Adding Decimals

20. 6 5. 4 +3 9. 3. 7 1 4. 0 9 0. 0 1 0 4. 7 6 5. 4 +3 9. 3 74 1.1 0 Partitioning Vertically Formal Written Method

21. 2 8. 7 +3 9. 3 1. 0 1 7. 0 5 0. 0 6 8. 0 2 8. 7 +3 9. 3 8 1.5 Partitioning Vertically Formal Written Method 0 1

22. 2 8. 7 +4 7. 8 1. 5 1 5. 0 6 0. 0 7 6. 5 2 8. 7 +4 7. 8 6 1.7 Partitioning Vertically Formal Written Method 5 1

23. 2 8. 7 + 4 7. 8 Partitioning Vertically 5 3. 6 2. 1 1 8. 0 1 1 0. 0 1.0 1 3 1 Formal Written Method 2 8. 7 + 4 7. 8 5 3. 6. 1 2 0 2 1 3

24. 3.12 +2.32.04.40 5.00 5.44 Adding by Partitioning Vertically

25. 5. 9 1 +1. 8 6. 0 7 1. 7 0 6. 0 0 7. 7 7 5. 9 1 +1. 8 6 77 1.7 Partitioning Vertically Formal Written Method

26. 4. 3 7 +2. 5 6. 2 2 1. 6 0 9. 0 0 1 0. 8 2 4. 3 7 +2. 5 6 2 2.1 0 Partitioning Vertically Formal Written Method 3. 8 9 8 1

27. Subtracting Decimals

28. 00.10.20.30.40.50.60.70.80.91.0 Decimals

30. Subtraction by adding on. 24.3 - 7.9 7.9 +0.1 8.010.0 +2.0 20.0 +10.0 = 16.4 24.3 - 7.9 0.1(to 8.0) 2.0(to 10.0) (to 20.0)10.0.4 +4.3 24.3 4.3(to 24.3) 61

31. Subtraction by adding on. 36.8 - 8.7 8.7 +0.3 9.010.0 +1.0 30.0 +20.0 = 28.1 36.8 - 8.7 0.3(to 9.0) 1.0(to 10.0) (to 30.0)20.0 +6.8 36.8 6.8(to 36.8).1 1 8 2

32. Subtraction by adding on. 42.8 - 19.3 19.3 +0.7 20.030.0 +10.0 40.0 +10.0 = 23.5 42.8 - 19.3 0.7(to 20.0) 10.0(to 30.0) (to 40.0)10.0 +2.8 42.8 2.8(to 42.8).5 1 3 2

33. Subtraction by adding on. 56.9 - 23.6 23.6 +0.4 24.030.0 +6.0 50.0 +20.0 = 33.3 56.9 - 23.6 0.4(to 24.0) 6.0(to 30.0) (to 50.0)20.0 +6.9 56.9 6.9(to 56.9).3 1 3 3 1

34. 00.10.20.30.40.50.60.70.80.91.0 Decimals

35. Subtraction by adding on. £7.85 - £3.49 3.49 +0.51 4.07.0 +3.0 7.85 +0.85 = £4.36 £7.85 - £3.49 0.51(to £4.00) 3.00(to £7.00) (to £7.85)0.85 6 £4.3 1

36. Subtraction by adding on. £9.63 - £5.28 5.28 +0.72 6.09.0 +3.0 9.63 +0.63 = £4.35 £9.63 - £5.28 0.72(to £6.00) 3.00(to £9.00) (to £9.63)0.63 5 £4.3 1

37. Subtraction by adding on. £12.51 - £7.83 7.83 +0.17 8.012.0 +4.0 12.51 +0.51 = £4.68 £12.51 - £7.83 0.17(to £8.00) 4.00(to £12.00) (to £12.51)0.51 8 £4.6

38. Subtraction by adding on. £23.94 - £17.62 17.62 +0.38 18.020.0 +2.0 23.0 +3.0 = £6.32 £23.94 - £17.62 0.38(to £18.0) 2.00(to £20.0) (to £23.0)3.00 +0.94 23.94 0.94(to £23.94) 2 1 £6.3 1

39. Subtraction by adding on. £35.12 - £27.59 27.59 +0.41 28.030.0 +2.0 35.0 +5.0 = £7.53 £35.12 - £27.59 0.41(to £28.00) 2.00(to £30.00) (to £35.00)5.00 +0.12 23.94 0.12(to £35.12) 3 £7.5