Question

Paul and krystal spent 1 1/2 hours at the pool. for half of that time,they swam laps what equation can be used to find the amount of time they spent swimming laps
a.1 1/2 - 1/2
b.1 1/2 ÷1/2
c.1/2 × 1 1/2
d.1/2 + 1 1/2​
BEST ANSWER WILL BE MARKED BRAINLIEST

Answer 1

Solution:

Note that:

• If a fraction is being divided by another fraction, that fraction will become it's reciprocal and the sign will change to multiplication.
• Example: x/6 ÷ y/2 = x/6 × 2/y

The question is saying "half of 1 1/2".

• => half of 1 1/2 = 1 1/2 ÷ 2 = 1 1/2 x 1/2

Option C is correct.

Answer 2

Answer:

C.  $1\dfrac{1}{2}$  *  $\dfrac{1}{2}$

Explanation:

They swam for total  $1\dfrac{1}{2}$  hours. Half of this hours they spent swimming laps.

Thus the equation:  $1\dfrac{1}{2}$  *  $\dfrac{1}{2}$ =  $\dfrac{3}{4}$ hours

don't confuse!   $\frac{1}{2}$ refers to ÷ 2

Easier method:

• given that they swam for $1\dfrac{1}{2}$, that's 1.5 hours in decimals.

• half hours: 1.5 ÷ 2 = 0.75 hours which is  $\dfrac{3}{4}$ hours in fraction.

• we can find  $\dfrac{3}{4}$ from option C only thus its our answer.