A Daniel has been asked to round 1.725 to one decimal place. His answer is 172.5
Explain Daniel's mistake.
B Nicole has rounded a number to one decimal place.
Her answer is 9.2
Write down 10 different possible numbers that she could have rounded.
C Dominic writes down two numbers, A and B.
A and B have 2 decimal places.
Dominic rounds A to 1 decimal place and calls his answer C.
He rounds B to 1 decimal place and calls his answer D.
Dominic says the difference between A and B cannot be the same as the
difference between C and D.
Show he is incorrect