Idea 8of 22Builds onThe median: the middle value in order
Put decimals in order by place value
Is 1.25 bigger than 1.4?
Today you'll discover
- how to order decimals
- the median of decimal data
Think firstThree long jumps: 1.5, 1.25, 1.4 m
What is the median jump?
Decide first, then press Next. Compare the tenths digit of each box.
A row of three boxes, 1.5, 1.25 and 1.4, slides into order: 1.25, 1.4, 1.5. Then 1.25 and 1.5 are crossed off and 1.4 is ringed as the median. The last step shows five ribbon lengths.
See the whole ideathe big idea and the key word, in one place
The big idea
To find a decimal median, order by place value: compare tenths before hundredths.
Easy to get wrongMore digits does not mean bigger. 1.25 has more digits than 1.4, but 2 tenths is less than 4 tenths.
Same placeWrite 1.5, 1.25 and 1.4 as 1.50, 1.25 and 1.40. Then compare them like whole numbers of hundredths.
Key word
- place value order
- comparing numbers place by place from the left: ones, then tenths, then hundredths
Ready to use it?
- Order decimal data and find its median.