Class 1 – Mathematics

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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

1

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.

Count:
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.

Count forward:
27, 28, ___, ___, 31

What number comes after 49?
Counting forward means moving to the next number.
2

Reading and Writing Number Names to 100

Numbers can be written using numerals or words. The written words are called number names.

1 — one
5 — five
10 — ten
15 — fifteen
20 — twenty
36 — thirty-six
50 — fifty
75 — seventy-five
100 — one hundred
Write the number names:
8 = ______
14 = ______
40 = ______
A numeral and its number name represent the same quantity.
3

Identifying Numbers Before, After and Between

Numbers have a fixed order. We can identify which number comes before, after or between other numbers.

Before 8 → 7
After 8 → 9
Between 8 and 10 → 9
___, 25, ___
39, ___, 41
What comes before 60?
Before means one step backward. After means one step forward.
4

Comparing Small Numbers Using Greater and Smaller

Comparing numbers tells us which number represents more, less or the same amount.

8 is greater than 5 → 8 > 5
3 is smaller than 7 → 3 < 7
6 is equal to 6 → 6 = 6
Fill in >, < or = :
9 ___ 4
5 ___ 5
2 ___ 8
The greater number represents the larger quantity.
5

Arranging Numbers up to 100

Numbers can be arranged from smallest to greatest or from greatest to smallest.

Ascending: 12, 25, 41, 67
Descending: 67, 41, 25, 12
Arrange from smallest to greatest:
45, 12, 31, 8
Ascending goes upward in value. Descending goes downward in value.
6

Understanding Ones and Tens

Place value tells us what a digit is worth because of its position in a number.

34 = 3 tens + 4 ones
30 + 4 = 34

57 = 5 tens + 7 ones
How many tens and ones?
42 = ___ tens + ___ ones
68 = ___ tens + ___ ones
Ten ones make one ten.
7

Introduction to Zero

Zero means there are no objects in a group. We write zero as 0.

There are 3 apples. If all 3 are taken away, 0 apples remain.

3 − 3 = 0

Zero is also important as a placeholder in numbers such as 10, 20 and 100.

5 − 5 = ___
2 − 2 = ___
Zero represents no quantity.

➕ Addition

8

Addition Using Objects and Pictures

Addition means putting groups together to find how many there are altogether.

🍎 🍎 + 🍎 = 🍎 🍎 🍎

2 + 1 = 3
⭐⭐⭐ + ⭐⭐ = ?
3 + 2 = ___
The symbol + means add or put together.
9

Single-Digit Addition

Single-digit addition involves adding numbers from 0 to 9.

2 + 3 = 5
4 + 4 = 8
6 + 2 = 8
7 + 1 = 8
3 + 5 = ___
6 + 3 = ___
4 + 2 = ___
Addition finds the total when quantities are combined.
10

Addition Within 20

We can add numbers while keeping the total at 20 or below.

8 + 5 = 13
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.

7 + 6 = ___
9 + 9 = ___
13 + 5 = ___

➖ Subtraction

11

Subtraction Using Objects and Pictures

Subtraction can mean taking objects away from a group to find how many remain.

There are 5 balls. Take away 2.
⚽ ⚽ ⚽ ⚽ ⚽

5 − 2 = 3
Start with 6 pencils. Take away 2 pencils.
How many remain?
The symbol − means subtract or take away.
12

Single-Digit Subtraction

Single-digit subtraction helps us find what remains after taking away a smaller quantity.

7 − 2 = 5
9 − 4 = 5
6 − 1 = 5
8 − 3 = 5
8 − 2 = ___
7 − 5 = ___
9 − 3 = ___
13

Subtraction Within 20

We can subtract numbers from quantities up to 20.

14 − 3 = 11
17 − 5 = 12
20 − 8 = 12
15 − 6 = 9
18 − 4 = ___
16 − 7 = ___
20 − 5 = ___
Counting backward can help with simple subtraction.

🧠 Mathematical Story Problems

14

Simple Addition Story Problems

A story problem uses a real-life situation to ask a mathematics question.

Riya has 4 pencils. Her friend gives her 3 more pencils.

4 + 3 = 7

Riya now has 7 pencils.
Aman has 5 balloons. He gets 4 more.
How many balloons does he have altogether?
Words such as more, altogether and in all can suggest addition, but always understand the story first.
15

Simple Subtraction Story Problems

Subtraction story problems often ask us to find how many remain after some are removed.

There are 9 birds. Three fly away.

9 − 3 = 6

Six birds remain.
There are 12 chocolates. Riya eats 4.
How many chocolates remain?
Decide what is happening in the story before choosing the operation.

🔷 Shapes, Position & Patterns

16

Recognising Basic Two-Dimensional Shapes

Two-dimensional or 2D shapes are flat shapes. They have length and width.

Circle ○ — round
Triangle △ — 3 sides
Square □ — 4 equal sides
Rectangle ▭ — 4 sides
Which shape has three sides?
Which listed shape has four equal sides?
2D shapes are flat shapes.
17

Recognising Basic Three-Dimensional Objects

Three-dimensional or 3D objects are solid. They have length, width and height.

Cube — like a dice
Cuboid — like a box
Sphere — like a ball
Cylinder — like a can
Cone — like an ice-cream cone
What 3D shape is similar to:
A football? ______
A dice? ______
18

Understanding Positions and Directions

Position and direction words tell us where something is or which way to move.

above / below
inside / outside
near / far
left / right
front / behind
Raise your right hand.
Place a pencil inside a box.
Put a book below another book.
Position tells where something is. Direction tells which way to move or face.
19

Creating Simple Repeating Patterns

A repeating pattern follows a rule that repeats again and again.

🔴 🔵 🔴 🔵 🔴 🔵

▲ ● ▲ ● ▲ ●

2, 4, 2, 4, 2, 4
Continue:
⭐ ❤️ ⭐ ❤️ ___ ___

1, 3, 1, 3, ___, ___
Find the part that repeats to discover the pattern rule.

📏 Measurement & Comparison

20

Comparing Long and Short Objects

Length tells us how long or short an object is.

A ruler may be longer than an eraser.
A pencil may be shorter than a broom.
Find two objects near you. Place their ends together and decide which is longer and which is shorter.
When comparing length directly, line up the objects from the same starting point.
21

Comparing Heavy and Light Objects

Weight tells us how heavy or light something is.

A school bag filled with books is usually heavier than a pencil.
A feather is lighter than a brick.
Which is likely heavier?
A watermelon or an apple?
A book or a sheet of paper?
22

Comparing More and Less Capacity

Capacity tells us how much a container can hold.

A bucket can usually hold more water than a cup.
A spoon holds less liquid than a bottle.
Which usually has greater capacity?
Cup or bucket?
Glass or water tank?
Capacity compares how much a container can hold, not simply how tall it looks.

🕐 Time & Calendar

23

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 3 and minute hand at 12 → 3 o’clock
Hour hand at 7 and minute hand at 12 → 7 o’clock
If the short hand points to 5 and the long hand points to 12, what time is it?
At an exact hour, the minute hand points to 12.
24

Understanding Morning, Afternoon and Night

We can describe different parts of a day using words such as morning, afternoon, evening and night.

Morning: We wake up and get ready for the day.
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 eat breakfast?
When do you usually go to sleep?
25

Learning Days of the Week

There are seven days in a week.

Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Which day comes after Tuesday?
Which day comes before Friday?
One week has 7 days.
26

Learning Months of the Year

One year has twelve months.

January • February • March • April • May • June
July • August • September • October • November • December
Which month comes after March?
Which month comes before December?
What month is your birthday in?
One year has 12 months.

💰 Money, Fractions & Data

27

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.

₹1 + ₹1 = ₹2
₹5 + ₹5 = ₹10
₹10 + ₹10 = ₹20
You have ₹10 and receive another ₹5.
How much money do you have altogether?
The symbol for the Indian rupee is ₹.
28

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.

One whole apple → 🍎

Cut equally into 2 parts → each part is one-half.

Two halves make one whole.
Fold a square piece of paper into two equal parts.
How many halves do you have?
A half must be one of two equal parts.
29

Reading Simple Picture Data

Pictures and symbols can be used to show simple information. We can count the symbols and compare the results.

Favourite Fruits

Apple: 🍎 🍎 🍎 🍎
Banana: 🍌 🍌 🍌
Orange: 🍊 🍊
Using the picture data above:
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?
Always check what each picture or symbol represents.

🚀 Number Patterns

30

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

2, 4, 6, 8, 10, 12, 14, 16, 18, 20

Count by 5s

5, 10, 15, 20, 25, 30, 35, 40, 45, 50

Count by 10s

10, 20, 30, 40, 50, 60, 70, 80, 90, 100
Complete:
2, 4, 6, ___, ___
5, 10, 15, ___, ___
10, 20, 30, ___, ___
Skip counting builds number-pattern skills and prepares learners for later multiplication.
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