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Addition based on end digit

Addition based on end digit

 The end digit of 17=7
The end digit of 8908=8
The end digit of 900076543=3

 Addition based on end digit

 1)7+9=16
2)89+6=95 (9+6=15,There fore end digit of 15 is 5 so keep the five and the 1 +8)
3)567+45=  13(7+5=613,6+4=10+1=11,1+5=6)

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