Numeric data: floating point
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. Which value is a floating point number?
2. A student records their height as 1.68 metres. Which data type suits this value best?
3. Which statement about integers and floating point numbers is correct?
4. A canteen stores the price of a sandwich as $4.50. Which data type is the better choice?
5. Which value is NOT a floating point number?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1height = 1.75 | AA comma is used instead of a decimal point, so the value is not a valid floating point number. It should be 19.95. | |
| 2price = 19.95 | BStores a money amount as a floating point number with 2 decimal places | |
| 3An integer is a whole number with no decimal part, unlike a floating point number | CStores a floating point number, because the value has a decimal part | |
| 4Floating point numbers suit measurements that are not always whole numbers, such as a person's height in metres | D175 has no decimal part, so it is an integer. A height in metres stored as a float should be written like 1.75. | |
| 5price = 19,95 | Eheight = 1.62 | |
| 6height = 175 (stored as a float, in metres) | Fstudents = 28 |
C
Definitions
float
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
price = _____("19.95")
print(price + 0.05)
2.
price = 19.9567
print(round(price, _)) # 19.96
3.
height = 1.82
print(type(______))
# <class 'float'>
4.
age = 16
print(isinstance(age, ___))
5.
weight = 62.5
print(isinstance(weight, _____))
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
item = 'Cap'
B
qty = 2
C
price = 19,95
Question 2
A
price = 4.50
B
total = price * '3'
C
print(total)
Question 3
A
temp = '36.6'
B
limit = 37.5
C
if temp > limit:
D
print('Fever')
Question 4
A
speed = 12.3456
B
rounded = round(speed, 1.0)
C
print(rounded)
Question 5
A
total = 7
B
share = total // 2
C
print(share)
Answer Key
Numeric data: floating point
Section A: Quick Questions
Q1
A — 1.75
Q2
A — Floating point
Q3
B — An integer has no decimal part, but a floating point number does
Q4
B — Floating point
Q5
A — 42
Section B: Match the Pairs
Q1
height = 1.75 → Stores a floating point number, because the value has a decimal part
Q2
price = 19.95 → Stores a money amount as a floating point number with 2 decimal places
Q3
An integer is a whole number with no decimal part, unlike a floating point number → students = 28
Q4
Floating point numbers suit measurements that are not always whole numbers, such as a person's height in metres → height = 1.62
Q5
price = 19,95 → A comma is used instead of a decimal point, so the value is not a valid floating point number. It should be 19.95.
Q6
height = 175 (stored as a float, in metres) → 175 has no decimal part, so it is an integer. A height in metres stored as a float should be written like 1.75.
Section C: Definitions
Q1
float — A floating point number is a number with a decimal part, such as 1.75 or 19.95. It is used for measurements like height and for money, unlike an integer, which has no decimals.Section D: Fill in the Blanks
Q1
price = float("19.95")
print(price + 0.05)Q2
price = 19.9567
print(round(price, 2)) # 19.96Q3
height = 1.82
print(type(height))
# <class 'float'>Q4
age = 16
print(isinstance(age, int))Q5
weight = 62.5
print(isinstance(weight, float))Section E: Spot the Error
Q1
C — A floating point number uses a full stop as its decimal point, not a comma. It should be price = 19.95.
Q2
B — The 3 is in quotes, so it is text, not a number. A float cannot be multiplied by text. It should be total = price * 3.
Q3
A — Quotes make 36.6 a string, not a floating point number, so it can't be compared with the float limit. It should be temp = 36.6.
Q4
B — The number of decimal places must be a whole number (an integer), not a float. It should be round(speed, 1).
Q5
B — // gives a whole number (3) and drops the decimal part. Use / to get the floating point answer 3.5.