All numbers that round to 80 include...
75, 76, 77, 78, 79, 80, 81, 82, 83, 84
An easy song that can help you remember when to round up or down is this...
(sing to the rhythm of "We Will Rock You")
or you can just read it...
~~~~~~~~~~~~~~~~~~~~~~~
Find your place, look next door
5 or greater add one more
All digits in front, stay the same
All digits behind, zero's your name
(optional)
We will, we will round you
~~~~~~~~~~~~~~~~~~~~~~~
Some examples of rounding to the nearest tens place would include...
93 -> 90
54 -> 50
98 -> 100
22 -> 20
167 -> 170
