What is the midpoint between 70 and 80
519+364=
397-138
438+275 =
870-462 =
278 students visit a museum. Round this number to the nearest ten.
Gia writes 642 on the board. Which number is 642 rounded to the nearest hundred?
Select the number that rounds to 50 when rounded to the nearest ten.
A factory made 1,248 toys today. About how many is that to the nearest hundred?
Which vocabulary word means to the opposite of another operation