Class 1 Mathematics
Learn mathematics step by step through 30 child-friendly topics covering numbers, addition, subtraction, shapes, patterns, measurement, time, money, fractions, data and skip counting.
🔢 Numbers & Place Value
Counting Numbers from 1 to 100
Counting tells us how many objects are in a group. We begin with 1 and move forward one number at a time.
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
11, 12, 13, 14, 15 … 98, 99, 100
When counting objects, point to each object once and say one number for it.
27, 28, ___, ___, 31
What number comes after 49?
Reading and Writing Number Names to 100
Numbers can be written using numerals or words. The written words are called number names.
5 — five
10 — ten
15 — fifteen
20 — twenty
36 — thirty-six
50 — fifty
75 — seventy-five
100 — one hundred
8 = ______
14 = ______
40 = ______
Identifying Numbers Before, After and Between
Numbers have a fixed order. We can identify which number comes before, after or between other numbers.
After 8 → 9
Between 8 and 10 → 9
39, ___, 41
What comes before 60?
Comparing Small Numbers Using Greater and Smaller
Comparing numbers tells us which number represents more, less or the same amount.
3 is smaller than 7 → 3 < 7
6 is equal to 6 → 6 = 6
9 ___ 4
5 ___ 5
2 ___ 8
Arranging Numbers up to 100
Numbers can be arranged from smallest to greatest or from greatest to smallest.
Descending: 67, 41, 25, 12
45, 12, 31, 8
Understanding Ones and Tens
Place value tells us what a digit is worth because of its position in a number.
30 + 4 = 34
57 = 5 tens + 7 ones
42 = ___ tens + ___ ones
68 = ___ tens + ___ ones
Introduction to Zero
Zero means there are no objects in a group. We write zero as 0.
3 − 3 = 0
Zero is also important as a placeholder in numbers such as 10, 20 and 100.
2 − 2 = ___
➕ Addition
Addition Using Objects and Pictures
Addition means putting groups together to find how many there are altogether.
2 + 1 = 3
3 + 2 = ___
Single-Digit Addition
Single-digit addition involves adding numbers from 0 to 9.
4 + 4 = 8
6 + 2 = 8
7 + 1 = 8
6 + 3 = ___
4 + 2 = ___
Addition Within 20
We can add numbers while keeping the total at 20 or below.
9 + 7 = 16
11 + 4 = 15
12 + 8 = 20
Make Ten Strategy
For 8 + 5, first make 10: 8 + 2 = 10. Then add the remaining 3. So 8 + 5 = 13.
9 + 9 = ___
13 + 5 = ___
➖ Subtraction
Subtraction Using Objects and Pictures
Subtraction can mean taking objects away from a group to find how many remain.
⚽ ⚽ ⚽ ⚽ ⚽
5 − 2 = 3
How many remain?
Single-Digit Subtraction
Single-digit subtraction helps us find what remains after taking away a smaller quantity.
9 − 4 = 5
6 − 1 = 5
8 − 3 = 5
7 − 5 = ___
9 − 3 = ___
Subtraction Within 20
We can subtract numbers from quantities up to 20.
17 − 5 = 12
20 − 8 = 12
15 − 6 = 9
16 − 7 = ___
20 − 5 = ___
🧠 Mathematical Story Problems
Simple Addition Story Problems
A story problem uses a real-life situation to ask a mathematics question.
4 + 3 = 7
Riya now has 7 pencils.
How many balloons does he have altogether?
Simple Subtraction Story Problems
Subtraction story problems often ask us to find how many remain after some are removed.
9 − 3 = 6
Six birds remain.
How many chocolates remain?
🔷 Shapes, Position & Patterns
Recognising Basic Two-Dimensional Shapes
Two-dimensional or 2D shapes are flat shapes. They have length and width.
Triangle △ — 3 sides
Square □ — 4 equal sides
Rectangle ▭ — 4 sides
Which listed shape has four equal sides?
Recognising Basic Three-Dimensional Objects
Three-dimensional or 3D objects are solid. They have length, width and height.
Cuboid — like a box
Sphere — like a ball
Cylinder — like a can
Cone — like an ice-cream cone
A football? ______
A dice? ______
Understanding Positions and Directions
Position and direction words tell us where something is or which way to move.
inside / outside
near / far
left / right
front / behind
Place a pencil inside a box.
Put a book below another book.
Creating Simple Repeating Patterns
A repeating pattern follows a rule that repeats again and again.
▲ ● ▲ ● ▲ ●
2, 4, 2, 4, 2, 4
⭐ ❤️ ⭐ ❤️ ___ ___
1, 3, 1, 3, ___, ___
📏 Measurement & Comparison
Comparing Long and Short Objects
Length tells us how long or short an object is.
A pencil may be shorter than a broom.
Comparing Heavy and Light Objects
Weight tells us how heavy or light something is.
A feather is lighter than a brick.
A watermelon or an apple?
A book or a sheet of paper?
Comparing More and Less Capacity
Capacity tells us how much a container can hold.
A spoon holds less liquid than a bottle.
Cup or bucket?
Glass or water tank?
🕐 Time & Calendar
Reading Time to the Hour
An analogue clock has an hour hand and a minute hand. When the minute hand points to 12, the clock shows an exact hour.
Hour hand at 7 and minute hand at 12 → 7 o’clock
Understanding Morning, Afternoon and Night
We can describe different parts of a day using words such as morning, afternoon, evening and night.
Afternoon: The time after noon.
Evening: The later part of the day before night.
Night: The dark part of the day when most people sleep.
When do you usually go to sleep?
Learning Days of the Week
There are seven days in a week.
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Which day comes before Friday?
Learning Months of the Year
One year has twelve months.
July • August • September • October • November • December
Which month comes before December?
What month is your birthday in?
💰 Money, Fractions & Data
Recognising Indian Coins and Notes
India uses the rupee as its main unit of money. Its symbol is ₹.
We use coins and banknotes of different denominations to pay for goods and services.
₹5 + ₹5 = ₹10
₹10 + ₹10 = ₹20
How much money do you have altogether?
Understanding Half and Whole
A whole means one complete object. When a whole is divided into two equal parts, each equal part is called a half.
Cut equally into 2 parts → each part is one-half.
Two halves make one whole.
How many halves do you have?
Reading Simple Picture Data
Pictures and symbols can be used to show simple information. We can count the symbols and compare the results.
Apple: 🍎 🍎 🍎 🍎
Banana: 🍌 🍌 🍌
Orange: 🍊 🍊
1. Which fruit has the most votes?
2. Which fruit has the fewest votes?
3. How many chose bananas?
4. How many more chose apples than oranges?
🚀 Number Patterns
Skip Counting by 2s, 5s and 10s
Skip counting means counting forward by the same amount each time instead of counting one by one.
Count by 2s
Count by 5s
Count by 10s
2, 4, 6, ___, ___
5, 10, 15, ___, ___
10, 20, 30, ___, ___