Alexa knit a total of 6 centimeters of scarf over 2 nights. How many nights will Alexa have to spend knitting in order to knit a total of 18 centimeters of scarf? Solve using unit rates.
If she knitted a total of 6 centimeters over 2 night period then the unit rate or the amount of centimeters per night would be 6/2 or 3 centimeters per night.
Then 18 centimeters / 3 centimeters would be 6 nights.
