# Multiplying 2 digit number by 1 digit number

In this section you will learn multiplying 2 digit number by 1 digit number.
In the earlier section , you have learnt about the multiplication of numbers on the number line as well as without number line.
There are different methods to do the multiplication of two digit number by one digit.
Method 1 :
Example : A flower has five petals. A bunch of flowers has 13 flowers. How many petals are there in the bunch? Solution : Total flowers = 13
Number of petals in each flower = 5
So total number of petals = 13 X 5
Write 13 as 10 + 3
10 X 5 = 50
3 x 5 = 15
Total petals = 50 + 15 = 65.
Method 2 :
23 x 3 :
This method is known as vertical method.
1) Write the bigger number.
2) Give the multiplication sign (x).
3) Write the 2nd number.
4) Multiply the 2nd number by the digit in ones place and write the answer.
5) Multiply the tens number by the 2nd number and write the answer using tens.
 23 ----> X 3 -----> ________ ∴ 23 x 3 = 69 2 tens + 3 ones X 3 ______________ 6 tesn + 9 ones 60 + 9 = 69

 3) 36 x 0   36 ----> X 0 -----> ________ ∴ 36 x 0 = 0 When you multiply any number by zero the answer will be 0(zero) only. 3 tens + 6 ones X 0 ______________ 0 tens + 0 ones 0 + 0 = 0

## Examples on multiplying 2 digit number by 1 digit number

1) A design has 3 flowers in it. A piece of cloth has 12 such designs. How many flowers will be on the cloth? Solution : Number of flowers in one design = 3
Total number of designs = 12
∴ Total number of flowers = 12 x 3
12
X 3
_________
3 ← 6
3 tens + 6 ones
= 36
Hence, 12 x 3 = 36.
1) Write the bigger number '12'.
2) Give the multiplication sign (x).
3) Write the 2nd number '3'.
4) Multiply the 2nd number(3) by the digit in ones place(2) and write the answer as 6 ones .
5) Multiply the tens number(1) by the 2nd number(3) and write the answer as 3 tens.
6) 3 tens + 6 ones = 30 + 6 = 36.
∴ Total number of flowers= 36.

Home

We at ask-math believe that educational material should be free for everyone. Please use the content of this website for in-depth understanding of the concepts. Additionally, we have created and posted videos on our youtube.

We also offer One to One / Group Tutoring sessions / Homework help for Mathematics from Grade 4th to 12th for algebra, geometry, trigonometry, pre-calculus, and calculus for US, UK, Europe, South east Asia and UAE students.

Affiliations with Schools & Educational institutions are also welcome.

Please reach out to us on [email protected] / Whatsapp +919998367796 / Skype id: anitagovilkar.abhijit

We will be happy to post videos as per your requirements also. Do write to us.

Russia-Ukraine crisis update - 3rd Mar 2022

The UN General assembly voted at an emergency session to demand an immediate halt to Moscow's attack on Ukraine and withdrawal of Russian troops.