1. Estimating Fractions

2. Rounding the nearest half
Sometimes it is better to round a fraction to the nearest half in order to estimate an addition or subtraction problem… 1

3. Rounding the nearest half7 9
Let’s say you want to estimate the sum of the following fractions and mixed numbers… 5
Is closer to 5, 5 ½ , or 6? 6
It’s a little closer to 6. 7 9 1 7 3 5 5 + 3 + 8 = 7 9 5 5 6 5½ 9 9 5
4 ½ 9 5 5

4. Rounding the nearest half1 7 3
Is closer to 3, 3 ½ , or 4? 6 3
It’s a little closer to 3. 7 9 1 7 3 5 5 + 3 + 8 = 1 7 3 3 4 3½ 7 7 3
3 ½ 7 3 3

5. Rounding the nearest half3 5 8
Is closer to 8, 8 ½ , or 9?
17 ½ 6 3 +
8 ½ = +
It’s a little closer to 8 ½ . 7 9 1 7 3 5
The estimated answer is 17 1/2 . 5 + 3 + 8 = 3 5 8 8 9 8½ 5 5 8
2 ½ 5 8 8

6. Round these fractions to the nearest half…3 11 2 2 2½ 3 2 9 12 12
12½ 13 11 17 5 5 5½ 6 5 24 6 6 6½ 7