Multiply a Number by a
2-Digit Number
How to multiply a number by a 2-digit number?
We shall revise here to multiply 2-digit and 3-digit numbers by a
2-digit number (multiplier) as well as learn another procedure for the
multiplication of 3-digit, 4-digit, etc., numbers by a 2-digit
multiplier.
1. Example to multiply 2-digit numbers by a 2-digit number:
Multiply 63 by 14
Solution:
(i) First Method
63 x 14
= (60 + 3) × (10 + 4) 63 = 60 + 3
14 = 10 + 4
= (60 + 3) × 10 + (60 + 3) × 4
= (600 + 30) + (240 + 12)
= 630 + 252
= 882
or, 63 × 14 = (60 + 3) (10 + 4)
= (60 + 3) x 4 + (60 + 3) x l0
= (240 +12) + (600 + 30)
= 252 + 630
= 882
(ii) Second Method
|
(a) 4 × 3 ones = 12 ones |
(iii) Third Method
(iv) Fourth Method
|
(a) 14 = 4 ones + 1 ten |
2. Example to multiply 3-digit numbers by a 2-digit number:
Multiply 456 x 43
Solution:
(i) First Method
(ii) Second Method
Hence, Product = 19608
Multiplication by 2 and 3 digit numbers
A. Find the product of 165 and 45.
Answer: 7290
B. Multiply: 1793 × 25
Answer: 44825
3. Example to multiply 4-digit numbers by a 2-digit number:
Multiply 3157 x 56
Solution:
(i) First Method
(ii) Second Method
Hence, Product = 176792
`Related Concept
● Addition
● Check for Subtraction and Addition
● Word Problems Involving Addition and Subtraction
● Estimating Sums and Differences
● Multiply a Number by a 2-Digit Number
● Multiplication of a Number by a 3-Digit Number
● Word Problems on Multiplication
● Division of Two-Digit by a One-Digit Numbers
● Division of Four-Digit by a One-Digit Numbers
● Division by 10 and 100 and 1000
● Division by Two-Digit Numbers
4th Grade Math Activities
From Multiply a Number by a 2-Digit Number to HOME PAGE
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.
|
|
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.