PUMPA - SMART LEARNING

எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

Book Free Demo
If a number has no sign, then it is a positive number.
Example:
10 means +10.
 
56 means +56.
Rules for adding two integers:
Rules for addition1.png
The sum of two positive numbers is always a positive number.
1. Add 5 and 10.
 
Step 15 and 10 both are positive numbers. That is like signs. So, add those numbers.
 
 
Step 2: Here, both numbers are like signs. So, the answer will also be in the same sign.
 
5 + 10 = 15.
 
The sum of two negative numbers is always a negative number.
2. Add (-25) and (-3).
 
Step 1(-25) and (-3) both are negative numbers. That is like signs. So, add those numbers.
 
 
Step 2: Here, both numbers are like signs. So, the answer will also be in the same sign.
 
(-25) + (-3) = -28.
 
The sum of positive and negative numbers keeps the sign of a larger number.
3. Add -56 and 23.
 
Step 1: -56 is a negative number and 23 is a positive number. That is unlike signs. So, subtract those numbers.
 
 
Step 2: Here, 56 is larger than 23. The sign of 56 is (-)negative.
 
(-56) + 23 = -33.