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Introduction to Multiplication Class 1 Notes Maths

Multiplication as Repeated Addition

Two elephant families are going for a jungle walk.
Introduction to Multiplication Class 1 Notes MathsEach family has 4 elephants.
We say, there are 4 + 4 = 8 elephants going for a jungle walk.
Or
There are 2 groups of elephants and there are 4 elephants in each group.
4 + 4 = 8 is called repeated addition expression for 2 (equal sized) groups of 4 elephants each. 

Adding the same number over and over again is called repeated addition.

Edurev Tips: 4 + 4 = 8 is called repeated addition because 4 is added repeatedly.

Another Way of Writing Repeated Addition

Look at the repeated addition expression in the picture.
Introduction to Multiplication Class 1 Notes Maths5 + 5 + 5 + 5 = 20
Instead of adding the same number 5 over and over again 4 times, an easier way to get the answer is 4 x 5 = 20.
4 x 5 = 20 is read as 4 times 5 is equal to 20. 
Or
4 multiplied by 5 is equal to 20.

Edurev Tips: 'x' is the sign of multiplication.
4 x 5 is the multiplication expression instead of repeated addition expression
5 + 5 + 5 + 5 = 20.

Multiplication on a Number Line

Multiplication can also be shown on a number line.
3 x 5 = 15 is represented below on the number line.
Introduction to Multiplication Class 1 Notes MathsStarting from 0, there are 3 jumps and each jump covers 5 units (steps) on the number line.
Or
3 times 5 units covered.
Or
3 x 5 = 15 (There are 3 jumps. Each jump is of 5 units,)

Multiplication Using an Array

Let us understand another way of multiplication— by using an array. Array is an arrangement of numbers or objects in rows and columns.
Look at the picture of 15 children sitting in 3 rows and 5 columns:
Introduction to Multiplication Class 1 Notes MathsHere, there are 3 equal groups of 5 children.
Or
There are 3 x 5 = 15 children in all.

Number of groups x Equal number of objects in each group = Number of objects

Edurev Tips: Array tells us how many groups of equals are there.

Building Multiplication Tables or “Times Tables”

Multiplication tables can be formed by repeated addition. 

  • Multiplication Table of 1
    Introduction to Multiplication Class 1 Notes Maths
  • Multiplication Table of 2
    Introduction to Multiplication Class 1 Notes Maths
  • Multiplication Table of 5
    Introduction to Multiplication Class 1 Notes Maths
  • Multiplication Table of 10
    Introduction to Multiplication Class 1 Notes Maths

Edurev Tips:

  • One multiplied by any number gives the number itself.
  • In multiplication table of 5 we have either 5 or 0 in the ones place.
The document Introduction to Multiplication Class 1 Notes Maths is a part of the Class 1 Course Mathematics for Class 1.
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FAQs on Introduction to Multiplication Class 1 Notes Maths

1. What is multiplication as repeated addition?
Multiplication as repeated addition is a concept in mathematics where multiplication is understood as the process of adding a number to itself multiple times. For example, 2 multiplied by 3 can be understood as 2 + 2 + 2, which is the same as adding 2 three times. This concept helps in understanding the relationship between addition and multiplication.
2. How is multiplication represented on a number line?
Multiplication can be represented on a number line by using jumps or intervals. For example, if we want to represent 3 multiplied by 4 on a number line, we start at 0 and make jumps of 3 units four times. The final point reached on the number line represents the product of 3 and 4, which is 12. This representation helps visualize the multiplication process and understand the concept of scaling.
3. How is multiplication done using an array?
Multiplication using an array involves representing numbers as rows and columns in a grid-like structure. For example, to multiply 2 by 3, we create a grid with 2 rows and 3 columns. Then, we fill each cell with the product of the corresponding row and column numbers. The sum of all the cells gives us the final product, which is 6 in this case. This method helps in understanding the concept of area and provides a visual representation of multiplication.
4. What are multiplication tables or "times tables"?
Multiplication tables, also known as "times tables," are a set of organized and structured tables that display the results of multiplying numbers from 1 to a certain value. These tables are commonly used to memorize and practice multiplication facts. Each row and column in the table represents a specific number, and the cell at the intersection of a row and column represents the product of those numbers. Multiplication tables are essential for quick mental calculations and building a strong foundation in multiplication.
5. How can I build my multiplication tables or "times tables" skills?
To build your multiplication tables skills, it is recommended to practice regularly and use various strategies. Here are some tips: 1. Start with small numbers and gradually increase the difficulty level. 2. Use flashcards or online resources to practice multiplication facts. 3. Break down complex multiplication problems into smaller, more manageable steps. 4. Apply multiplication in real-life situations to understand its practical significance. 5. Play multiplication games or engage in interactive activities to make learning fun and engaging. By consistently practicing and applying these strategies, you can improve your multiplication tables skills and become more efficient in solving multiplication problems.
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