math
posted by Shohanur on .
calvin buys 3/5 pound of ground beef. he divides the beef into 6 equal portions.
a)find the weight of 1 portion of beef.
b)fin the weight of 4 portions of beef.

3/(5*6) = 3/30 = 1/10 = 0.1
times 4 = 0.4 
(3/5)/ 6 = (3/5) * (1/6) = 3/30 = 1/10
(1/10) * 4 = ? 
1/40?

No.
That answer doesn't even make sense.
Please study Damon's and my answers. 
2/5

much better 2/5 = 4/10 = 0.4

Right.
4 portions weighs 2/5 of a pound. 
I don't get how I did that

Both the numerator and the denominator of 4/10 are divisible by 2.
4/10 = 2/5 
oh

1/10*4/1=4/10=2/5

Yay! You've got it!

devon buys a plot of land with the area of 5/6 square kilometer. he divides the land equally into 4 smaller plots of land. what is the total area of 3 of the smaller plots of land?

(5/6) / 4
(5/6) * 1/4 = ______ total area of each of the plots 
3 not 4

This is your first step:
he divides the land equally into 4 smaller plots of land.
Then take 3/4 of that number to answer the question. 
(5/6) * (3/4) =

1/4

2 2/5