Whenever we want to simplify two numbers, first we have to check if numbers are having same sign or different sign.
Example 1 :
Simplify (–10) + (+17)
Solution :
= –10 + 17
By considering the above numbers, both are having different signs. So,
Subtract the smaller number from greater number and tag greater number sign.
= +7
Hence, 7 is the answer.
Example 2 :
Simplify (+20) + (–13)
Solution :
= (+20) + (–13)
= +20 –13
By considering the above numbers, both are having different signs.
Subtract the smaller number from greater number and tag greater number sign.
= +7
Hence, 7 is the answer.
Example 3 :
Simplify (–50) + (–20)
Solution :
= (–50) + (–20)
= –50 – 20
By considering the above numbers, both are having same signs.
Add both numbers and tag greater number sign.
= -70
Hence, -70 is the answer.
Example 4 :
Simplify (+40) + (+70)
Solution :
= (+40) + (+70)
= + 40 + 70
By considering the above numbers, both are having same signs.
Add both numbers and put greater number sign.
= + 110
Hence, 110 is the answer.
Example 5 :
Simplify (+18) + (–75)
Solution :
= (+18) + (–75)
= +18 –75
By considering the above numbers, both are having different signs.
Subtract the smaller number from greater number, put greater number sign.
= - 57
Hence, -57 is the answer.
Example 6 :
Simplify (+75) + (–75)
Solution :
= (+75) + (–75)
= + 75 – 75
By considering the above numbers, both are having different signs.
Subtract the smaller number from greater number, put greater number sign.
= 0
Hence, 0 is the answer.
Example 7 :
Simplify (–30) + (12)
Solution :
= (–30) + (12)
= –30 + 12
By considering the above numbers, both are having different signs.
Subtract the smaller number from greater number, put greater number sign.
= -18
Hence, -18 is the answer.
Example 8 :
Simplify (–30) + (–22)
Solution :
= (–30) + (–22)
= –30 – 22
By considering the above numbers, both are having same signs.
Add both numbers and put greater number sign.
= - 52
Hence, -52 is the answer.
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