parislover2000
26.08.2020 •
Mathematics
Can anyone pls tell me when do we cross multiply and when do we multiply 10 * 75 im really confused
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Ответ:
You don't multiply liters of gasoline by distance.
They are directly proportional - the more gasoline you have the longer is the dictance you can go.
So it's cross multiply.
Another examlpe:
you are paid by hour for your work. The more hours you have worked, the more you are paid:
hours payment
2 h $36
5 h x
You would multiply 10•70 if they were inversely poportional values
For example:
1. speed and time of ride by given distance {the greater the speed the less time you need for a ride}
speed time
10 m/s 75 s
8 m/s x
2. price and kolos of apples - the higher the pice the less of kilos you can buy by given cash
price kilos of apples
$2 8
$4 x
Ответ:
false -- 2/3 is not a whole number
true -- a terminating decimal is like 0.35 which is 35/100
false
true
so, 2 out of 4.