Round 89 to the nearest ten.
89 is a two-digit number. The eight digit is worth eight 10s
or 80. So, the number 89 is more than
80. And the 10 which comes after 80 is
90. The number 89 is between the
numbers 80 and 90. When we round a two-digit number to
its nearest ten, we have to look at the ones digit. If the ones digit is less than
five, we have to round down. And if the ones digit is worth five
or more, we have to round up.
Let’s place number 89 on the number
line. 85, 86, 87, 88, 89. 89 has nine ones. As nine is greater than five, we
need to round up. The nearest ten to 89 is 90. We rounded 89 to the nearest
ten. 89 rounded to the nearest ten is