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94 + 57

151

First, add the tens digits, 90 + 50 = 140. Remember that for a moment. Now, add the one's digits, 4 + 7 = 11. Now, add the 11 to the 140 to get 151. ---- Alternately, subtract 6 from 57 and give it to 94, so we have 100 + 51 = 151.

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