122 is the answer, NOT 142(as the previous poster said, which is wrong.) This is why: 35+47=82
82-10=72
72-50=22
22+100=122
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Answer : 130
17
10 - 5/0.5 + 16(4) + 20 + 100 - (100)^(0.5) = 10 - 10 + 64 + 120 - 10 = 174 Your wording is confusing so this may not be the correct answer.
2/5 plus 1/5 minus 3/10 is equal to 0.3 or 3/10
Just put a minus sign in front of them. But be careful when subtracting numerals that have a subtractive element in them. For example: C-XL = LX because it is the same as 100 - (- 10 + 50) = 60. In mathematics a minus followed by a minus is equal to a plus - (- 10) = 10 try it out on your calculator.