The document explains and demonstrates the method of subtraction by adding on through examples of subtracting whole numbers and decimals. It shows how to set up the subtraction problem vertically and then add on in steps to get from the number being subtracted to the next place value until reaching the final difference. The method involves decomposing numbers into place values and adding those place value amounts until reaching the number being subtracted from.

1. Subtracting

2. Explanation of subtraction by adding on. Click to view each step & follow the method through. 502 - 198 198 +2 200 500 +300 502 +2 = 304 502 - 198 2 (to 200) 300 (to 500) (to 502) 2 304

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

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

5. How to set out your subtraction by adding on vertically 6008 - 2997 3 (3000) 3000 (6000) (6008) 8 3011

6. How to set out your subtraction by adding on vertically 5003 - 1989 11 (2000) 3000 (5000) (6008) 3 3014

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

8. Subtracting Decimals

9. 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Decimals

10. Subtraction by adding on. 24.3 - 7.9 7.9 +0.1 8.0 10.0 +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) 6 1

11. Subtraction by adding on. 36.8 - 8.7 8.7 +0.3 9.0 10.0 +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

12. 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Decimals

13. Subtraction by adding on. 7.85 - 3.49 3.49 +0.51 4.0 7.0 +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

14. Subtraction by adding on. 9.63 - 5.28 5.28 +0.72 6.0 9.0 +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