Multiplication by 1-digit Number

How to Multiply by a 1-Digit Number

We will learn how to multiply any number by a one-digit number.

Multiplication of a 4-Digit Number by a 1-Digit Number:

1. Multiply 2154 and 4.

Solution:

Step I: Arrange the numbers vertically.

Multiplication by 1-digit Number

Step II: First multiply the digit at the ones place by 4.

4 × 4 = 16 = 1 ten + 6 ones

Write 6 in the ones column and carry 1 ten to tens place.


Step III: Multiply the digit at the tens place by 4.

5 × 4 = 20 tens

20 + 1 (carried) = 21 tens = 2 hundreds + 1 ten

Write 1 in ten place and carry 2 hundreds to hundreds place.


Step IV: Multiply the digit at hundreds place by 4.

1 hundred × 4 = 4 hundreds

4 hundreds + 2 hundreds (carried) = 6 hundreds

Write 6 in hundreds place.

 

Step V: Multiply the digit at thousands place by 4.

2 thousands × 4 = 8 thousands

Write 8 in thousands place.


2. Multiply 7325 and 9.

Solution:

Step I: Arrange the numbers vertically.

Multiply by 1-digit Number

Step II: First multiply the digit at the ones place by 9.

5 × 9 = 45 = 4 ten + 5 ones

Write 5 in the ones column and carry 4 tens to tens place.


Step III: Multiply the digit at the tens place by 9.

2 × 9 = 18 tens

18 + 4 (carried) = 22 tens = 2 hundreds + 2 ten

Write 2 in ten place and carry 2 hundreds to hundreds place.


Step IV: Multiply the digit at hundreds place by 9.

3 × 9 = 27 hundreds

27 hundreds + 2 hundreds (carried) = 29 hundreds = 2 thousands + 9 hundreds

Write 9 in hundreds place and carry 2 thousands to thousands place.

 

Step V: Multiply the digit at thousands place by 9.

7 thousands × 9 = 63 thousands

63 thousands + 2 thousands (carried) = 65 thousands = 6 ten thousands + 5 thousands

Write 5 in thousands place and 6 ten thousands in ten thousands place.


3. Multiply 2,634 by 3.

Solution:

Step I: Align the digits.

Th

H

T

O

2

6

3

4

×

3


  

  

  

  



Step II: Multiply ones.

4 ones × 3 = 12 ones = 1 ten 2 ones.

Write 2 in ones place and carry 1 to the tens place.

Th

H

T

O

1

2

6

3

4

×

3





2



Step III: Multiply tens.

3 tens × 3 = 9 tans.

9 tens + 1 ten (carried) = 10 tens = 1 hundred 0 tens

Write 0 in tens place and carry 1 to the hundreds place.

Th

H

T

O

1

1

2

6

3

4

×

3




0

2



Step IV: Multiply hundreds.

6 hundreds × 3 = 18 hundreds.

18 hundreds + 1 thousand (carried) = 19 hundreds = 1 thousand 9 hundreds. Write 9 in hundreds carry 1 to thousands place.



9

0

2



Step V: Multiply thousands.

2 thousands × 3 = 6 thousands

6 thousands + 1 thousand (carried) = 7 thousands.

Write 7 in thousands place.

Th

H

T

O

1

1

1

2

6

3

4

×

3


7

9

0

2


Therefore, the product of 2,634 and 3 = 7,902.


4. Multiply 6492 by 8.

Solution:

Multiplication of a 4-Digit Number by a 1-Digit Number


Worksheet on Multiplication by 1-digit Number:

1. Multiplication of 4-Digit Numbers by 1-Digit Number by column method.

(i) 2031 × 3 = __________

(ii) 1347 × 2 = __________

(iii) 5120 × 4 = __________

(iv) 1227 × 7 = __________

(v) 2310 × 6 = __________

(vi) 3127 × 5 = __________

(vi) 4081 × 8 = __________

(vi) 5526 × 9 = __________

(ix) 8052 × 3 = __________


Answers:

(i) 6093

(ii) 2694

(iii) 20480

(iv) 8589

(v) 13860

(vi) 15635

(vi) 32648

(vi) 49734

(ix) 24156


2. Multiply the given 4-Digit Numbers by 1-Digit Number horizontally. Start from right. One has been done for you.

Multiply 4-Digit Numbers by 1-Digit Number

(ii) 2121 × 3 = __________

(iii) 3004 × 2 = __________

(iv) 9865 × 1 = __________


Answers:

(ii) 6363

(iii) 6008

(iv) 9865

You might like these







4th Grade Math Activities

From Multiplication by 1-digit Number to HOME PAGE


New! Comments

Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.



Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.



Share this page: What’s this?

Recent Articles

  1. Method of H.C.F. |Highest Common Factor|Factorization &Division Method

    Apr 13, 24 05:12 PM

    HCF by Short Division Method
    We will discuss here about the method of h.c.f. (highest common factor). The highest common factor or HCF of two or more numbers is the greatest number which divides exactly the given numbers. Let us…

    Read More

  2. Factors | Understand the Factors of the Product | Concept of Factors

    Apr 13, 24 03:29 PM

    Factors
    Factors of a number are discussed here so that students can understand the factors of the product. What are factors? (i) If a dividend, when divided by a divisor, is divided completely

    Read More

  3. Methods of Prime Factorization | Division Method | Factor Tree Method

    Apr 13, 24 01:27 PM

    Factor Tree Method
    In prime factorization, we factorise the numbers into prime numbers, called prime factors. There are two methods of prime factorization: 1. Division Method 2. Factor Tree Method

    Read More

  4. Divisibility Rules | Divisibility Test|Divisibility Rules From 2 to 18

    Apr 13, 24 12:41 PM

    Divisibility Rules
    To find out factors of larger numbers quickly, we perform divisibility test. There are certain rules to check divisibility of numbers. Divisibility tests of a given number by any of the number 2, 3, 4…

    Read More

  5. Even and Odd Numbers Between 1 and 100 | Even and Odd Numbers|Examples

    Apr 12, 24 04:22 PM

    even and odd numbers
    All the even and odd numbers between 1 and 100 are discussed here. What are the even numbers from 1 to 100? The even numbers from 1 to 100 are:

    Read More