Question

Mathew used his computer for 2 1/8 hours in Tuesday evening and for 2 1/4 hours in Wednesday evening. Which is the best estimate of the time Mathew used his computer on Tuesday and Wednesday evenings

Answer 1

About 4 hours. When you add the numbers together, you get

2 1/8 + 2 1/4 = 35/8 = 4 3/8 = 4.375

Explanation:

Since the answer is not greater than 4.5, you round down to 4. If the answer was greater than 4.5, you would have rounded up to 5.