the diameter of a soup can is 7cm. the label wraps around the can. about how many centimeters long must the label be to go all the way around the soup can? use 22/7 for pi describe how to mentally check whether your answer is reasonable
When I stretch my hand out, the distance between the tip of my middle finger and the tip of my thumb is about 18 centimeters. My hand doesn't go completely around a soup can, so 22 cm must be about right.
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How would you mentally check to see if your answer is correct?