Primary 4 Mathematics syllabus: topics and practice questions
These are the topics and skills of Primary 4 Mathematics in the MOE syllabus, with 381 original practice questions. Each topic below has a sample question: try it, then open the worked answer.
Number & Algebra
Whole Numbers
86 practice questions
Read, write and compare numbers up to 100 000
Round numbers to the nearest 10, 100 or 1000
Multiply by a 1-digit or 2-digit number
Divide by a 1-digit number, with remainders
Solve word problems with the four operations
Sample question
Write forty-five thousand three hundred and eighty in numerals.
Show the answer and working
Answer: 45380
How: forty-five thousand three hundred and eighty = 45 380
Why: Reading the words place by place tells us the digit for each place. Places that are not mentioned get a 0 so the other digits stay in the right places.
Factors and Multiples
28 practice questions
Find factors and common factors
Find multiples and common multiples
Sample question
How many factors does 12 have?
Show the answer and working
Answer: 6
How: Factors of 12: 1, 2, 3, 4, 6, 12
That is 6 factors.
Why: Listing the factors in pairs makes sure none is missed.
Fractions
43 practice questions
Change between mixed numbers and improper fractions
Add and subtract fractions with related denominators
Find a fraction of a set of objects
Sample question
Write 17/5 as a mixed number.
Show the answer and working
Answer: 3 2/5
How: 17 ÷ 5 = 3 R 2 17/5 = 3 2/5
Why: Every 5 5ths make one whole. 3 wholes use 15 of them, leaving 2.
Decimals
73 practice questions
Read, compare and order decimals up to 3 places
Round decimals to a whole number, 1 or 2 decimal places
Add and subtract decimals
Multiply and divide decimals by a 1-digit whole number
Convert between fractions and decimals
Sample question
What is the value of the digit 7 in 4.375?
Show the answer and working
Answer: 0.07
How: In 4.375, the 7 is worth 0.07.
Why: Each place to the right of the decimal point is worth one tenth of the place before it.
Measurement & Geometry
Time
23 practice questions
Use the 24-hour clock
Find durations and end times
Sample question
Write 3.45 p.m. in 24-hour clock time.
Show the answer and working
Answer: 15 45
How: 3.45 p.m. = 15 45
Why: After 12 noon, the 24-hour clock carries on counting: 3 p.m. is 3 + 12 = 15.
Area and Perimeter
42 practice questions
Find the area and perimeter of rectangles and squares
Find a missing side from the area or perimeter
Find the area and perimeter of figures made of rectangles
Sample question
Find the area of the rectangle.
Show the answer and working
Answer: 84 cm²
How: 12 × 7 = 84 cm²
Why: The shape can be covered by 7 rows of 12 one-centimetre squares.
Angles
34 practice questions
Measure angles in degrees and relate them to turns
Use the 8-point compass
Sample question
∠ABC is a right angle. ∠ABD = 35°. Find ∠DBC.
Show the answer and working
Answer: 55 °
How: 90° − 35° = 55°
Why: The line BD splits the right angle into two parts that add up to 90°.
Rectangles and Squares
13 practice questions
Use properties of rectangles and squares to find unknown angles and lengths
Sample question
ABCD is a rectangle. AC is a straight line. ∠BAC = 37°. Find ∠CAD.
Show the answer and working
Answer: 53 °
How: 90° − 37° = 53°
Why: ∠BAD is a right angle, and AC splits it into ∠BAC and ∠CAD.
Symmetry
14 practice questions
Identify symmetric figures and lines of symmetry
Sample question
Is the dashed line a line of symmetry of the rectangle?
A Yes
B No
Show the answer and working
Answer: (B) No
How: No. Folding along a diagonal does not make the halves match.
Why: The two halves are the same size, but one is turned round, so they do not land on each other when folded.
Statistics
Tables
13 practice questions
Read and complete tables
Sample question
The table shows fruit sold at a stall. What is the total for Mangoes?
Show the answer and working
Answer: 130
How: 56 + 74 = 130
Why: The Mangoes row gives one number for each column; together they make the total.
Line Graphs
12 practice questions
Read and interpret line graphs
Sample question
The line graph shows the temperature. What was the temperature at 10 am?
Show the answer and working
Answer: 27
How: At 10 am: 27°C
Why: Each point on the line shows the value at that time.
Practise all 381 Primary 4 questions
With an account, practice adapts to your child: hints one step at a time, feedback on the mistake behind a wrong answer, review of older topics and a Primary 4 mock paper.