Mathematics in Real Life Context
Presentation
•
Mathematics
•
8th - 11th Grade
•
Practice Problem
•
Hard
Uzma Latif
Used 80+ times
FREE Resource
11 Slides • 23 Questions
1
Mathematics in Real Life Context
2
Mathematics in Real Life Context
Percentages
3
Percentages
Practice converting percentages to decimals and vice versa
Remember you move decimal two places to the left to convert percentages to decimals.
4
Multiple Choice
34% is
0.034
0.34
3.4
34
5
Multiple Choice
3331% is
33.33
3.33
0.333
0.0333
6
Multiple Choice
24.2% is
0.0242
24.2
0.242
242
7
Multiple Choice
60% is
60
6
0.06
0.6
8
Multiple Choice
9.3% is
0.093
9.3
0.0093
93
9
Profit/Loss
profit or loss is percentage change
remember that to calculate percentage change (profit/loss) numerator is always the difference between final and initial value
the denominator is either cost price or selling price (read the problem carefully)
profit is same as percentage increase
loss is same as percentage decrease
10
Multiple Choice
Percentage of loss on SP =
CPSP−CP×100 %
CPCP−SP×100 %
SPSP−CP×100 %
SPCP−SP×100 %
11
Multiple Choice
If, loss = Rs.40 and SP = Rs.250 then find percentage of loss.
15 %
13.79%
16%
14.25%
12
Multiple Choice
If CP=Rs. 80; SP=Rs.120 then find profit percentage.
33 31%
50 %
40 %
20 %
13
Remember CP includes the overhead expenses.
Transportation charges
Rent of shop
Salary of workers
Electricity bills
14
Multiple Choice
A television set was bought for $25250 and spend $800 for transportation. What was the price of a television?
$26000
$25250
$24450
$26050
15
Discount
Discount is always calculated on Marked Price.
Marked price is the price mentioned on the tag/ article.
Selling price is the price calculated after discount.
Discount is same as percent decrease.
16
Multiple Choice
If the marked price of a water cooler is Rs. 4650. The shopkeeper offers an off-season discount of 18% on it. Then its selling price is _______
4650×18
4650×.18
4650×0.82
17
Multiple Choice
Q18. The marked price of a calculator is $200 and it is sold for $170. What is the discount (percent)?
200170×100
17030×100
20030×100
18
Multiple Choice
Kassidy is at LIDS shopping for her boyfriends birthday gift. She found a deal on the hat he wants and it now costs $39, after the 25% discount. How much did the hat originally cost?
$49.88
$13
$26
$52
19
Profit, Loss and Discount- Working together
Read the problem carefully.
Better to make an equation first or
Go step- by -step
20
Multiple Choice
Simple problem
A retailer purchased radio sets at the rate of Rs. 400 each from a wholesaler. He raised the price by 30% and then allowed a discount of 8% on each set. His profit will be
18.6%
19.6%
19.2%
20.4%
21
Multiple Choice
Toffees are bought at 27 for a rupee. How much must be sold for a rupee so as to gain 50%?
12
16
24
18
22
Multiple Choice
The cost of manufacture of an article was Rs. 900. The trader wants to gain 25% after giving a discount of 10%.
The marked price should be
Rs 1250
Rs 2250
Rs 1000
Rs 1500
23
Simple interest
I = 100PRT
P stands for the principal amount
T stans for time - usually in years
R stands for rate in %age
I stands for interest--------the additional amount you will get/ have to pay
Amount includes the principal and the interest
A = I + P
24
Multiple Choice
Emilio borrows $1200 from a bank with 8% simple interest per year. How much will he have to pay back total in 2 years?
$1800
$120
$1500
$1392
25
Multiple Choice
26
Hire purchase
Remember Interest is paid on the amount excluding the downpayment
For monthly intallments, you calculate the total amount to be paid including interest then divide by number of months
HPP includes is simply the downpayment and total amount to be paid as monthly installment
27
Multiple Choice
Cash Price: RM 40,000
Deposit: 10% of the cash price
Interest: 8% p.a.
Payable: 5 years of equal monthly instalments
What was the hire purchase price???????
RM 36,000
RM 40,000
RM 50,400
RM 54,400
28
Multiple Choice
Cash Price: RM 2,200
Down Payment: RM 800
Instalment: 18 monthly instalments of RM 150 each.
The total interest on hire purchase was RM____.
1,300
800
500
300
29
Multiple Choice
Sarah wants to buy a chair using Hire Purchase. She pays £37 deposit and 5 monthly payments of £20. How much does she pay in total?
£137
£285
£57
£80
30
Multiple Choice
Angelique wants to buy a microwave on a hire purchase agreement. The cash price of the microwave is Rs 4 400. She is required to pay a deposit of 10% and pay the remaining loan amount off over 12 months at an interest rate of 9%
9% p.a.
What is the principal loan amount?
R 4 400
R 3 9600
R 440
R 3690
31
Money Exchange
Working with multiplication is always easy
First step should be determine the multiplication factor------- price of 1 for both currencies
Next read the problem.
Here you go!!!!!
32
Multiple Choice
If you are going to visit America and have $2999 to spend, how much currency could you obtain? (1AUD = 0.68USD)
1x 0.68
1÷0.68
2999×0.68
2999×0.68
33
Multiple Choice
If the exchange rate is £1 = $1.25, what is $2250 equivalent to in £ pounds?
£1800
£ 2250
£2813
£1700
34
Mathematics in Real Life Context
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