Answer:
30.8
Explanation:
All you have to do is take the 0.1 and add it to the 30.7 so you would add it to the .7 which gives you 8 and now just put the 30 back with your decimal
its 30.8. this is because .7 + .1 = .8 . Now just add that to the 30 and you get 30.8
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