Primary 1 Mathematics
P1 Maths: numbers 1-100, basic addition/subtraction, shapes, length, weight, time.
The order below is the recommended shallow-to-deep path.
Units 單元
Tap a unit name to jump to its topics.
數與加減 Numbers & add/subtract13/13 live
- 1Counting 1 to 10Foundation✓
- 2Counting 11 to 20Foundation✓
- 3Counting 1 to 100Foundation✓
- 4Odd and Even NumbersFoundation✓
- 5Ordinal NumbersFoundation✓
- 6Addition within 10Foundation✓
- 7Subtraction within 10Foundation✓
- 8Addition within 20Foundation✓
- 9Subtraction within 20Foundation✓
- 10Addition Word ProblemsFoundation✓
- 11Subtraction Word ProblemsFoundation✓
- 12Simple PatternsFoundation✓
- 19Pictogram (Statistics)Foundation✓
⚡ Unit quiz 快測5 Qs
Answer on your own first, then reveal — wrong answers go to your wrong-answer book.
Q1What comes after 1?
Q2What comes after 10?
Q3How many tens in 35?
Q4Is 5 odd or even?
Q5The one at the very front is what position?
圖形與空間 Shapes & space3/3 live
⚡ Unit quiz 快測5 Qs
Answer on your own first, then reveal — wrong answers go to your wrong-answer book.
Q1How many sides does a triangle have?
Q2A die is what solid shape?
Q3Is your head up or down?
Q4How many corners does a square have?
Q5A ball is what solid shape?
度量 Measures3/3 live
⚡ Unit quiz 快測5 Qs
Answer on your own first, then reveal — wrong answers go to your wrong-answer book.
Q1Dad or a child, who is taller?
Q2A book or a sheet of paper, which is heavier?
Q3Is the hour hand the long or short hand?
Q4An ant or an elephant, which is longer?
Q5What tool measures weight?
錢幣 Money1/1 live
⚡ Unit quiz 快測5 Qs
Answer on your own first, then reveal — wrong answers go to your wrong-answer book.
Q1How many 10c coins make $1?
Q2A ball costs $8; pay $10; change?
Q3Two 50c coins equal?
Q4$5 + $2 = ?
Q5Want an $8 item with $5 only. Enough?
數據處理 Data handling1/1 live
⚡ Unit quiz 快測5 Qs
Answer on your own first, then reveal — wrong answers go to your wrong-answer book.
Q1What is the first step of sorting?
Q2What should you check after sorting?
Q38 toys in 2 groups; one has 5 — the other?
Q4Give a colour sorting example.
Q5What do you do with each group?
Vocabulary book 生字簿
All terms, bilingual (printable).
To count objects one by one.
A symbol for a quantity, e.g. 1, 2, 3.
No amount at all, written 0.
Ten ones; you have ten fingers.
From smallest to biggest: 1, 2, 3...
Asking about a quantity.
Matching a number to a set of objects.
A bigger quantity, e.g. 8 is more than 5.
10 ones bundled together make one ten.
Ten plus one, written 11.
Ten plus nine, the largest teen.
Two tens, written 20.
11 to 19, ten plus some ones.
Ten sticks bundled together.
Keep counting from a number, e.g. 11, 12 after 10.
Loose sticks, e.g. 13 has 3 ones.
How many tens, e.g. 35 has 3 tens.
How many ones, e.g. 35 has 5 ones.
A digit's place tells its value.
Ten tens, written 100.
A symbol from 0 to 9.
Counting 10, 20, 30...
Seeing which number is bigger.
Keep counting from a number.
Ends in 1, 3, 5, 7 or 9.
Ends in 0, 2, 4, 6 or 8.
The rightmost digit.
A group of two.
Giving out.
The one left after pairing.
Counting 2, 4, 6, 8.
0 is even.
At the very front.
Right after first.
Position number 3.
The place in a line.
The arrangement from front to back.
Standing one behind another.
Ahead of you.
At the end of the line.
Put two groups together.
The symbol +.
The symbol =; both sides are the same.
How many altogether.
Start from one number and keep counting.
All together.
The answer to an addition.
A maths sentence, e.g. 3 + 2 = 5.
Take away some and count what is left.
The symbol -.
What remains after taking away.
To remove some.
Count backwards from the bigger number.
Cross out pictures to subtract.
Nothing left, that is 0.
The answer to a subtraction.
Move 1 to the tens place when ones pass 10.
The rightmost place.
The place left of the ones.
First make 10, then add the rest.
Writing numbers in columns to add.
The answer to addition.
Bundle ten ones into one ten.
How many altogether.
Borrow 1 ten as 10 ones when ones are not enough.
Break one ten into ten ones.
The rightmost place.
The place left of the ones.
Count backwards from the bigger number.
What remains after subtracting.
The answer to subtraction.
Check subtraction with addition.
All together.
The amount after adding.
Some extra amount.
Adding everything.
A maths story question.
A maths sentence like 3 + 5 = 8.
Words hinting add or subtract.
The counting unit: sweets, balls, dollars.
What remains.
Eaten away.
Flew off.
Given to someone else.
Asking what remains.
Remove some.
How far apart two numbers are.
Check subtraction with addition.
A repeating arrangement.
Happening again and again.
Keep the pattern going.
The gap to fill in the pattern.
Numbers in a rule, e.g. 2, 4, 6.
Getting bigger each time.
Getting smaller each time.
The hidden rule, e.g. add 2 each time.
Round, no straight sides, no corners.
3 sides, 3 corners.
4 equal sides, 4 right angles.
2 pairs of equal sides, 4 right angles.
A straight edge of a shape.
Where two sides meet.
A flat form with an outline.
A bending line, like a circle's edge.
Like a ball, curved all over.
Like a can, two round faces.
Like a shoebox, 6 rectangular faces.
Like a die, 6 square faces.
Like an ice cream cone, 1 round face and a point.
A flat surface of a solid.
A shape with thickness that takes up space.
A shape with only one face, like a square.
Towards your head.
Towards your feet.
The side of your left hand.
The side of your right hand.
The way you are facing.
Behind your back.
Where something is.
In the middle of two things.
A big distance between two ends.
A small distance between two ends.
Great height of an upright object.
A tool for measuring length.
Line up one end with another.
Find a length using a tool.
A length unit, symbol cm.
See which is longer or shorter.
Presses your hand down.
Easy to hold up.
Find the weight with a scale.
A tool for measuring weight.
A scale comparing two sides.
A weight unit, symbol kg.
The heavier of two things.
The lighter of two things.
A tool that shows time.
The short, slow hand; shows the hour.
The long, fast hand; shows the minutes.
When the minute hand points at 12.
The face with numbers 1 to 12.
12:00 in the day.
12:00 at night.
Hours and minutes.
A chart using pictures for amounts.
Tells what one picture stands for.
The picture used, like an apple or star.
The row with the most pictures.
The row with the fewest pictures.
One horizontal line of pictures.
Count the pictures.
The one most people like.
HKD unit, symbol $.
Money made of metal.
Money made of paper.
One tenth of a dollar.
Half a dollar; two of them make $1.
How much a thing costs.
Give money to the seller.
Money given back when you pay too much.
To put similar things together.
A set of similar things.
Red, yellow, blue — a sorting feature.
Circle, square, triangle.
Big or small.
A characteristic used for sorting.
To say numbers in order.
Not different; alike.