Each problem below has an error in the answer. Find the error, explain how to correct the mistake, and correct it.
The decimal point is in the wrong place. The answer should be
The decimal points are not lined up. The answer should be
The student did not add 0's to the 100 before subtracting. They also forgot to "borrow" when subtracting. The answer should be
Look at part (a) for help. How many decimal places should there be in the answer?
Look at part (c) for help.
Look at part (b) for help. Can you quickly estimate what the answer should be close to?