Question

For the following problems, tell what operation(s) you need to use. Then, write and solve an equation for each problem.

Answer 1

Solution-

1.

Bill bought a computer and a printer for a total of $650.

Let p stand for the cost of the printer, so

$\text{Cost of the computer + p} =650$

$\Rightarrow 525+p=650$

$\Rightarrow p=650-525=125$

2.

Bonnie ordered 27 products from one company

Let m stand for the number of missing items

$\text{Number of item she got + m} =27$

$\Rightarrow 19+m=27$

$\Rightarrow m=27-19=8$

3.

Terri bought four lipsticks for a total cost of $20

Let l stand for the cost of one lipstick.

$Price\ of\ one\ lipstick \times I=20$

$\Rightarrow 4 \times I=20$

$\Rightarrow I=5$

4.

Each survey takes him about 10 minutes to complete

Let h stand for the number of hours

$Tota\l time\ taken\ = Time\ taken\ for\ 1\ survey\ in\ hours\times no.\ of\ survey$

$Total\ time\ taken\ =\frac{10}{60} \times 30 = 5 hours$

5.

Andy played golf three times during his vacation. His scores were 92, 87, and 88.

Let A stands for the average.

$Average \ score=A= \frac{Score_1+Score_2+Score_3}{3} =\frac{92+87+88}{3}=89$

6.

Tickets to a local basketball team’s games cost $12 each. Brendon and Ed each bought tickets to four games.

Total tickets = 2×4=8 (∵ They each bought 4 tickets)

(Let t stand for the amount spent on tickets.

$Amount\ spent\ on\ tickets\ =price\ of\ 1\ ticket \times total\ ticket}$

$\Rightarrow t=12 \times 8=96$

Answer 2

1. In this question subtraction operation will be used.

Let the price of printer be = p

Total amount paid = $650

Price of computer = $525

So, the price of printer will be , $p=650-525=125$

Hence the price of printer is $125.

2. In this question subtraction operation will be used.

Let the number of missing items be = m

Number of products ordered = 27

Number of products received = 19

So, number of missing orders =$m=27-19=8$

3. In this question, division operation is used.

Let the cost of one lipstick = L

Cost of 4 lipsticks = 20

Cost of 1 lipstick =$L=\frac{20}{4}=5$

Hence, the cost of 1 lipstick = $5

4. In this question, division operation is used.

Let the number of hours taken to do 30 surveys = h

6 surveys are done in = 1 hour

1 survey is done in = $\frac{1}{6}$

so, 30 surveys will be done in = $\frac{1}{6}\times30=5$ hours.

5. In this question. addition and division operations are used.

Let the average be = A

$A=\frac{sum of events}{number of events}$

Sum of scores = $92+87+88=267$

A=$\frac{267}{3}=89$

Hence, average is 89.

6. In this question, multiplication operation is used.

Let the amount spent on tickets be = t

As given, Brendon and Ed each bought tickets to 4 games, so total tickets bought = 8

Cost of 1 ticket = $12

Cost of 8 tickets = $12\times8=96$

Hence total amount is $96.