Nate starts his camping trip with 70 matches. He drops 10 in a creek and his dog eats twice as many. How many matches does he have left? Think carefully first, then make a decision:
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First find the number of matches the dog eats: 10 matches * 2 = 20 matches. Then subtract all the lost matches from the starting number to find the final number: 70 matches - 10 matches - 20 matches = 40 matches. So, the answer is 40.
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