FUNDAMENTAL OPERATION ON DECIMAL
You are already familiar with the four fundamental operations ( Addition, Subtraction, Multiplication and Division ) on decimals.
1) Find the value of 1.457 + 234.25 + 23.478 + 25.127 = ?
Answer) 1 . 4 5 7
2 3 4 . 2 5 0
2 3 . 4 7 8
+ 2 5 . 1 2 7
----------------------
2 8 4 . 3 1 2
So, the desired answer is 2 8 4 . 3 1 2 (Ans.)
Example.2) find the value of 23.457 + 0.247 + 249.78 + 3274.357 + 7.12 = ?
Answer) 2 3 . 4 5 7
0 . 2 4 7
2 4 9 . 7 8 0
3 2 7 4 . 3 5 7
+ 7 . 1 2 0
--------------------
3 5 5 4 . 9 6 1
So, the desired result is 3 5 5 4 . 9 6 1 (Ans.)
Example.3) Divide the product of 2.35 and 25.45 by 0.25
Answer.) As per the given condition I have to find out the product of
2 5 . 4 5
X 2 . 3 5
----------------
1 2 7 . 2 5
7 6 3 . 5 X
5 0 9 0 . X
---------------------- 5 9 8 0 . 7 5
So the obtained product of two given number is 5980.75, now we have to divide 0.25
So, 0.25 ) 5980.75 (
If we place decimal point to two steps ahead towards write side for both the dividend and divisor, then we find 25 as a divisor and 598075 as dividend.
So, now - 25 ) 598075 ( 23923
50
--------
98
75
--------
230
225
---------
57
50
--------
75
75
--------
0
Hence the required answer is 23923 (Ans.)