II. Preparation: (Only type examples given).
| (1) | (2) | (3) | |
| 3 bushels | 3 parts | Rule: | Only like numbers |
| + 5 bushels | + 5 parts | can be added. | |
| 8 bushels | 8 parts | ||
III. Presentation:
| (1) | (2) |
| 3 ninths | 3/9 |
| + 5 ninths | + 5/9 |
| 8 ninths | 8/9 |
| (3) | (4) |
| 2/3 = 4/6 | 2/3 = 8/12 |
| 1/6 = + 1/6 | 3/4 = + 9/12 |
| 5/6 | 17/12 |
IV. Summary:
(1) Only like fractions can be added.
(2) Change unlike fractions to like fractions.
(3) Add the numerators, placing the sum over the common denominator.
V. Application:
Examples and problems involving similar and dissimilar fractions.