Idea 13of 24Builds onA fraction is a spot on the number line
Same bottom number: compare the tops
Which is greater, 3/8 or 5/8?
Today you'll discover
- why same-size parts make it easy
- where the two sit on the line
- how to order fractions with one bottom number
Think first3/8 and 5/8 of the same pizza
Which is more pizza: 3/8 or 5/8?
Decide first, then press Next. Check that the parts are the same size.
A number line from 0 to 1 cut into eighths, with 3/8 and 5/8 to place. Jumps from 0 reach each one, the dots are named, then 3/8 < 5/8 is written. The last step shows a line in tenths with 7/10, 3/10 and 9/10.
See the whole ideathe big idea and the key word, in one place
The big idea
With the same denominator, the fraction with the greater numerator is greater.
Easy to get wrongThis only works when the bottom numbers match. 3/4 and 3/8 have the same top, but they are not equal.
Around youOn a trail marked in tenths of a kilometre, 9/10 km is further along than 7/10 km.
Key word
- same denominator
- the same bottom number, so the parts are the same size
Ready to use it?
- Compare two fractions with the same denominator.
- Order fractions with the same denominator.