Question

Solve the question below

Answer 1

Answer:

$3\frac{3}{4} \ hours$

Step-by-step explanation:

First, let's find how much time they went swimming. We are given they spent twice as much time swimming as fishing.

$1 \frac{1}{4}*2=\frac{5}{4}*2=\frac{5}{2}=2 \frac{1}{2}$

Now, we need to add these two fractions together.

$1\frac{1}{4}+2\frac{1}{2}$

To do this, we have to convert to a common denominator. To do this, we can find the Least Common Multiple of the denominators. List all of the multiples of 2 and 4:

2: 2, 4

4: 4

They share a common multiple of 4, so convert 2 1/2 to have a denominator of 4.

$2\frac{1}{2}=\frac{5}{2}*\frac{2}{2}=\frac{10}{4}=2\frac{2}{4}$

Notice we can only multiply the fraction by 2/2 because any number over itself is equivalent to 1.

$1\frac{1}{4}+2\frac{2}{4}=3\frac{3}{4}$

Answer 2

Answer:

in all they spent 3 3/4 hours fishing and swimming in all

Step-by-step explanation:

if you know that they spent 1 1/4 hours fishing and that they spent twice that swimmin,

you can calculate the time spent swimming by doubling it:

1 1/4 hours is the same as 5/4 hours

doubled it is 10/4 hours that they spent swimming

all together, 10/4+5/4 is 15/4 hours which can be reduced to 3 3/4 hours