Page 18 - SM Class 4 Inner.cdr

Example 2 : Add 4, 23, 107 and 2, 32, 820.
Solution : Write the numbers in columns. First add ones 7 + 0 = 7
Add tens 0 + 2 = 2 L TTh Th H T O
Add hundreds 1 + 8 = 9
4 2 3 1 0 7
Add thousand 3 + 2 = 5
+ 2 3 2 8 2 0
Add ten thousand 2 + 3 = 5
6 5 5 9 2 7
Add Lakhs 4 + 2 = 6
So, Sum is 655927

Addition of 5-digit and 6-digit numbers with carry over
We know how to add three-digit and four digit numbers, Now, we will learn to

add larger numbers.

Consider the following examples

Example 3 : Find the sum of 43428 and 46325.
Arrange the digits of the addends in columns and add.
First ones 8 + 5 = 13 ones TTh Th H T O
= 1 ten + 3 ones (carry 1 ten) 1
Add tens 1 + 2 + 2 = 5 tens 4 3 4 2 8 ® Addend
Add hundred 4 + 3 = 7 + 4 6 3 2 5 ® Addend
Add thousand 3 + 6 = 9 8 9 7 5 3
Add ten thousand 4 + 4 = 8 ® Sum
The sum is 89753.

Example 4 : Find the sum of 58209 and 23490.
Arrange the digits of the addends in columns and add.
Add ones 9 + 0 = 9 ones
Add tens 0 + 9 = 9 tens TTh Th H T O
Add hundred 2 + 4 = 6 hundred 1
Add thousands 8 + 3 = 11 thousands 5 8 2 0 9 ® Addend
10 thousand + 1 thousand + 2 3 4 9 0 ® Addend
Carry 1 thousand 8 1 6 9 9
Add ten thousand 1 + 5 + 2 = 8 ® Sum
The sum is 81699.

Example 5 : Find the sum of 569438 and 234526.
Arrange the digits of the addends in columns and add.
Add ones 8 + 6 = 14 ones = 1 ten + 4 ones
L TTh Th H T O
Carry 1 ten
1 1 1
Add tens 1 + 3 + 2 = 6 tens ® Addends
Add hundreds 4 + 5 = 9 5 6 9 4 3 8
Add thousand 9 + 4 = 13 thousands + 2 3 4 5 2 6 ® Addends
1 ten thousands + 3 thousands 8 0 3 9 6 4 ® Sum
Add ten thousands.
1 + 6 + 3 = 10 ten thousands = 0 ten thousands + 1 lakh
Carry 1 lakh
Add lakhs 1 + 5 + 2 = 8 lakhs
The sum is 803964
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Mathematics In Focus - 4