Question 1
LEVEL 1
Round 51 354 to the nearest thousand.
Select the correct answer from the list below:
A:
B: 50000
C: 51300
D: 51350
CORRECT ANSWER: A: 51000
WORKED SOLUTION:
Here, we are rounding to the nearest thousand so it is the 2nd digit, 3, we are interested in.
To round up or down we have to consider the value of the digit to its immediate right which in this case is 3
As 3 is less than 5, we round down and so the zero stays the same and we make the rest of the digits zero.
So we get 51000
Question 2
LEVEL 1
Round 32.4567 to 2 decimal places.
Select the correct answer from the list below:
A:
B: 32.45
C: 32
D: 32.5
CORRECT ANSWER: A: 32.46
WORKED SOLUTION:
Here, we are rounding to 2 decimal places, so it is the 2nd digit after the decimal point, 5, we are interested in.
To round up or down we have to consider the value of the digit to its immediate right which in this case is 6
As 6 is bigger than 5, we round up and so the 5 increases by 1 to 6
So we get 32.46
Question 3
LEVEL 1
Round 0.082398 to 3 significant figures.
Select the correct answer from the list below:
A:
B: 0.08
C: 0.082
D: 0.08240
CORRECT ANSWER: A: 0.0824
WORKED SOLUTION:
Here, we are rounding to 3 significant figures, so it is the 3rd non-zero digit, 3, we are interested in.
To round up or down we have to consider the value of the digit to its immediate right which in this case is 9
As 9 is bigger than 5, we round up and so the 3 increases by 1 to 4
So we get 0.0824
Question 4
LEVEL 1
Round 7234.129 to 1 decimal place.
Select the correct answer from the list below:
A: 7234.1
B: 7234.13
C: 7000
D: 7234
CORRECT ANSWER: A: 7234.1
WORKED SOLUTION:
Here, we are rounding to 1 decimal place, so it is the 1st digit after the decimal point, 1, we are interested in.
To round up or down we have to consider the value of the digit to its immediate right which in this case is 2
As 2 is less than 5, we round down and so the 1 stays the same.
So we get 7234.1
Question 5
LEVEL 1
Round 7.500 to 1 significant figure.
Select the correct answer from the list below:
A:
B: 7
C: 7.5
D: 7.50
CORRECT ANSWER: A: 8
WORKED SOLUTION:
Here, we are rounding to 1 significant figure, so it is the 1st non-zero digit, 7, we are interested in.
To round up or down we have to consider the value of the digit to its immediate right which in this case is 5
As 5 is greater than or equal to 5, we round up and so the 7 increases by 1 to 8
So we get 8