Students learned how to write ratios in three different forms: 1/4, 1:4, 1 to 4. Examples were shared and students created ratios from given scenarios.
P.O.N. 11.24.14
The scale on a map is 2 cm : 10 km. If two cities are 18 cm apart on the map, what is the actual distance in km between two cities?
- understand the concept of a ratio.
- use ratio language to describe a ratio relationship between two quantities.
For Evening Practice, the student is expected to...
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- complete numbers 6 - 14 and 26 - 29.
RATIO WORD PROBLEMS: GIRLS TO BOYS
The actual distance is 90 miles. I got this because 2cm is equal to 10 km, and the distance in cm is 18. to get 18 you would do the distance of 2cm*9=18 so 10*9=90
ReplyDeleteSean,
DeleteI like the explanation on how you solved the proportion. Make sure you are using the correct unit of measure for your problem.
I got 90 km. I got my answer by knowing that they want the cm to be 18 so If you make it 18 then what you did to 2 to make it 18 you must do to the km. Since you now want to figure how many times 2 goes into 18 you can divide and get 9. Next since you multiplied 2 and 9 you must do it to 10. Which if you multiply 10 and 9 you would get 90 km.
ReplyDeleteKnicksterblocker
Knicksterblocker,
DeleteI like how you see the connection of multiplication when dealing with the two ratios. Nice work with using the appropriate unit of measure as well.