Fraction, Decimal, Percentages
25%
Find 10% of 640
64
Simple Interest Formulae
I=PRT/100
Write 3.5 x 10-4 in ordinary form
0.00035
If the probability a biased coin lands on heads is 0.37. What is probability that the coin lands on tails?
0.63
Write the numbers in order starting with the smallest.
7/10, 75%, 0.71, 0.079
0.079, 0.7 (7/10), 0.71, 0.75 (75%)
How much is 12 out of 56 written as a percentage?
21.43%
Compound Interest Formula
A=P(1+r/100)t
Write 720 billion in standard form
7.2 x 1011
At a carnival, there is a game where you shoot balls into a basket. The probability of getting the ball into the basket is 1/6.
If you shot 30 balls, how many would you expect to get in?
5
Decrease 79 by 45%
43.45
SST is charged at 6% on watches. The amount of SST charged on a watch is RM240. Find the total cost of the watch.
RM4000
Ms Clarke invests RM7000 in an account that pays 3.45% compound interest. What is the calculation works out the value of her investment after 4 years?
7000 x 1.03454
Work out 2.4 x 106 ÷ 6.4 x 103
3.75 x 102
The probability that a biased spinner lands on red is 0.36. The probability that a biased dice lands on a number greater than 4 is 7/20. Amira spins the spinner once and rolls the dice once. Find the probability that the spinner does not land on red and the dice lands on a number greater than 4.
0.224 or 28/125
A bike costs RM880. The cost of the bike is reduced by 10% in a sale. What is the cost of the bike in the sale?
RM792
A car cost RM99 000 when new. After 2 years the car is worth RM87 000. What percentage of its value has the car lost?
12.1%
Martin invests RM3000 for 4 years at 6% per annum simple interest. Calculate the value of the investment at the end of 4 years.
RM3720
Work out 7.3 x 108 + 2.1 x 107
7.51 x 108
What is the probability of rolling a 2 and then a number higher than 4 when rolling two 6 sided dice?
2/36 or 1/18
A laptop costs $1,200. A student pays a 20% deposit and the rest in 10 monthly payments. Calculate the monthly payment.
$96
A car is now worth $18,000 after it depreciated by 10% over the year.
What was the car’s value at the beginning of the year?
$20,000
Ms Kelly invests RM5000 in a simple interest account. After 4 years her investment has earned RM350 interest. What rate of interest does the account pay?
1.75%
Work out 2.4 x 106 ÷ 6.4 x 105
Give your answer as a mixed number.
3 3/4
Liam walks to school every Tuesday and Friday.
If it rains, the probability that he is late to school is 0.2. Find the probability that Liam is late for school on exactly one of the two days. (You may use tree diagram to help you visualise)
(0.2 x 0.8) + (0.8 x 0.2)
= 0.16+0.16
= 0.32