Decimals: Place Value, Ordering & Rounding — Worksheet & Memo

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Grade 8 · Decimal Fractions

Decimals: Place Value, Ordering & Rounding

EXAM-STYLE CLASS TEST

Marks

Duration

45 minutes

Questions

Name:

Class:

Date:

Mark

/ 29

Instructions and Information

Answer ALL the questions in this question paper.
Answer QUESTION 1 by circling the letter (A–D) in the answer grid at the end of that section.
Show ALL calculations clearly.
Show all units where applicable.
Number the answers correctly according to the numbering system used in this question paper.
A non-programmable calculator may be used, unless stated otherwise.
Write neatly and legibly.

Question 1

[10 MARKS]

Four options are given as possible answers to the following questions. Choose the correct answer and circle the letter (A–D) in the grid at the end of this section. If you want to change your choice, put a cross through the wrong letter and circle your new choice.

1.1
In the number 4,263 the digit 6 is worth …
(1)
A)6 tenths
B)6 hundredths
C)6 thousandths
D)6 units
1.2
Which one of the following is the LARGEST number?
(1)
A)0,38
B)0,4
C)0,308
D)0,199
1.3
5,472 rounded off to TWO decimal places is …
(1)
A)5,48
B)5,47
C)5,50
D)5,4
1.4
R23,4562 rounded off to the nearest CENT is …
(1)
A)R23,45
B)R23,46
C)R23,50
D)R24,00
1.5
Which one of the following statements is TRUE?
(1)
A)5,470 is bigger than 5,47
B)5,470 is equal to 5,47
C)5,470 is smaller than 5,47
D)5,470 is not a decimal
1.6
Written as a decimal, 38 is …
(1)
A)0,38
B)0,375
C)0,83
D)3,8
1.7
The number 0,07 written as a common fraction in its simplest form is …
(1)
A)710
B)7100
C)71000
D)17
1.8
Which one of the following lists is arranged in DESCENDING order?
(1)
A)0,9 ; 0,85 ; 0,8 ; 0,75
B)0,75 ; 0,8 ; 0,85 ; 0,9
C)0,8 ; 0,75 ; 0,9 ; 0,85
D)0,85 ; 0,9 ; 0,75 ; 0,8
1.9
2,5 million written in full is …
(1)
A)2 500
B)2 500 000
C)250 000
D)25 000 000
1.10
A tin holds 0,375 kg. Rounded to ONE decimal place, its mass is …
(1)
A)0,3 kg
B)0,4 kg
C)0,38 kg
D)1 kg

Answer grid — circle your answers for Question 1

1.1	A	B	C	D
1.2	A	B	C	D
1.3	A	B	C	D
1.4	A	B	C	D
1.5	A	B	C	D
1.6	A	B	C	D
1.7	A	B	C	D
1.8	A	B	C	D
1.9	A	B	C	D
1.10	A	B	C	D

Question 2

[9 MARKS]

Answer the questions below WITHOUT using a calculator.

2.1
Write down the value of the 6 in 4,263, and the value of the 2.
(3)
2.2
Arrange in ascending order: 0,7; 0,65; 0,607; 0,76
(3)
2.3
Fill in < or >: 0,38 ___ 0,4, and then arrange 0,38 ; 0,4 ; 0,308 in ascending order.
(3)

Question 3

[10 MARKS]

Round off each of the following as instructed.

3.1
Round 5,472 off to TWO decimal places, and then to ONE decimal place.
(3)
3.2
Round 12,996 off to TWO decimal places.
(3)
3.3
Round R23,4562 off to the nearest cent.
(2)
3.4
Explain why 5,470 and 5,47 have the same value.
(2)

TOTAL: 29 marks

This question paper consists of 3 questions.