Question

Jenny charges $9.15 an hour to babysit toddlers and $7.45 an hour to babysit school aged children. If Jenny babysat toddlers for 9 hours and school aged children for 6 hours how much money did she earn in all?

Answer 1

$127.05.

Further explanation

Given:

• Jenny charges $9.15 an hour to babysit toddlers and $7.45 an hour to babysit school-aged children.
• Jenny babysit toddlers for 9 hours and school-aged children for 6 hours

Question:

How much money did she earn in all?

The Process:

Let's prepare the total earnings for each activity.

Total earnings to babysit toddlers  

$\boxed{ \ 9 \ hours \times \frac{ \ 9.15}{1 \ hour} = \boxed{ \ \ 82.35 \ } \ }$

We use decimal operations, like this:

     9  .  1    5

9 | 81. | .9 | .45 ⇒ 81. + .9 + .45 = $82.35

Total earnings to babysit school-aged children  

$\boxed{ \ 6 \ hours \times \frac{ \ 7.45}{1 \ hour} = \boxed{ \ \ 44.7 \ } \ }$

We use decimal operations, like this:

      7  .    4    5

6 | 42. | 2.4 | .3 ⇒ 42. + 2.4 + .3 = $44.7

Hence, the total earnings in all are $\boxed{ \ \ 82.35 + \ 44.7 = \boxed{ \ \ 127.05 \ } \ }$

Let's also consider the following quick steps.

Quick Steps:

Here we directly calculate the sum of the total earnings in all Jenny's activities. Use parentheses for each multiplication operation.

Total earning $\boxed{ \ = \bigg(9 \ hours \times \frac{ \ 9.15}{1 \ hour} \bigg) + \bigg(6 \ hours \times \frac{ \ 7.45}{1 \ hour} \bigg) \ }$

$\boxed{ \ \ 82.35 + \ 44.7 = \boxed{ \ \ 127.05 \ } \ }$

Thus, the money Jenny earned in all was $ 127.05.

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Keywords: Jenny, charges $9.15 an hour, to babysit toddlers, $7.45 an hour, to babysit school-aged children, for 9 hours, for 6 hours, how much money did she earn in all?

Answer 2

Total money earned by Jenny is $\fbox{\bf\ 127.05\end}$.

Further explanation:

Charges of an hour for baby sit toddlers is $\ 9.15$.

therefore, charges of 9 hours for babysit toddlers is $\bf\ 9\times9.15}$.

Charges of an hour for babysit school aged childrenis $\ 7.45$.

Therefore, Charges of 6 hours for babysit school aged children is $\bf\ 6\times7.45$.

The total money earned by the Jenny can be calculated as follows:

$\begin{aligned}{\text{Total money}}&=9\times9.15+6\times7.45\\&=82.35+45.7\\&=127.05\\\end{aligned}$

The total money earned by the Jenny is $\fbox{\bf\ 127.05\end}$.

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Answer Details:

Grade: Junior High School

Subject: Mathematics

Chapter: NA

Keywords: simplification, multiplication, addition, toddler, word problem, babysit toddler, babysit school aged children, Jenny, $9.15, $7.45, 6 hours, 9 hours.