Question

Carlos spent 1 1/4 hours doing his math homework. He spent 1/4 of this time practicing his multiplication facts.

Answer 1

Carlos spent 15 minutes practicing his multiplication facts.

Explanation:
An hour is 60 minutes, Carlos practiced his multiplication facts for 1/4 of an hour.

First you must do 60 divided by 4 which is 15. 1/4 of an hour is 15 minutes.

Answer 2

Answer:

$\frac{5}{16}$ hours

Step-by-step explanation:

We have been given that Carlos spent 1 1/4 hours doing his math homework. He spent 1/4 of this time practicing his multiplication facts.

To find the time spend by Carlos on practicing his multiplication facts, we need to calculate 1/4 of 1 1/4.

1/4 of 1 1/4 means multiplying 1/4 by 1 1/4 as:

$\frac{1}{4}\times 1\frac{1}{4}$

Convert mixed fraction to improper fraction:

$1\frac{1}{4}\Rightarrow \frac{1\times 4+1}{4}=\frac{4+1}{4}=\frac{5}{4}$

$\frac{1}{4}\times 1\frac{1}{4}\Rightarrow\frac{1}{4}\times\frac{5}{4}$

$\frac{1\times 5}{4\times 4}$

$\frac{5}{16}$

Therefore, Carlos spent $\frac{5}{16}$ hours practicing his multiplication facts.