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The answer is 38. One possible explanation is that you add 10 to 20, then add 8.
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This question is very open, since Max and friends could have been riding different kinds of bikes, such as a two-seater with two wheels, a regular bike, or a bike with training wheels.
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Possible answers are Tuscaloosa Bay, which is 70 miles from the start of Max's trip, and Palooka, which is 136 miles. The children can either estimate using tens or actually add the distances to get the answer.
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The answer is 55. Children would add the miles Max rode to get to Tuscaloosa Bay, which equals 70, then subtract 15 miles for a total of 55 miles.
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