On the following lines, count by 100: 100, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________
Every number that you wrote down is a “hundred”.
If you were counting by ones, between which 2 hundreds would you say the number 729? Fill in all the blanks below.
700, _______, _______, _______, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, 729, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, _______, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, ________, _____, _____, _____, 800
Do you see that 729 comes between 700 and 800? Which hundred (100) is 729 closer to? _______
That means that if you were asked to round 729 to the nearest hundred,
the answer would be
700 because 729 is really closer to 700 than to 800.
Write the hundreds that these numbers come between.
____ 616_____ ____ 227_____ ____ 888____ ____ 401_____ ____169_____
Now round each of these numbers to the nearest hundred (100).
616 ______ 227 ______ 888 ______ 401 ______ 169 ______ 333 _____
Explain why 333 would be rounded 300 ____________________________________________________
© Ellen Gabor, 1998