Idea 17of 22Builds onBeats per minute from 15 seconds
The unit rate is the amount for one
How far does the train go in just one hour?
Today you'll discover
- how to divide a rate down to one
- what a unit rate is
- how to check a unit rate
Think firstThe train goes 240 km in 3 hours
At the same speed, how far does the train go in 1 hour?
Decide first, then press Next. Find the tick for 1 on the top line.
Two number lines, hours on top and kilometres below, with ticks at 3 hours and 240 km and 6 hours and 480 km. Then a green tick at 1 hour and 80 km, joined across by a dashed line, with the words 1 hour: 80 kilometres. Then a printer's line with 1 minute at 15 pages. The last step shows a hike, 20 km in 4 hours.
See the whole ideathe big idea and the key word, in one place
The big idea
A unit rate is the amount for one: 80 km per hour.
Unit rates80 km per hour. 15 pages per minute. 72 beats per minute. Each says how much for 1 hour or 1 minute.
Easy to get wrongDivide both amounts, not just one. 240 km ÷ 3 = 80 km, and 3 hours ÷ 3 = 1 hour.
Key word
- unit rate
- a rate for 1 of the second unit, like 80 km per hour
Ready to use it?
- Find a unit rate by dividing both amounts.
- Check a unit rate against the first pair.