7th grade math help asap please
posted by Delilah on .
-1/9 + (-5/7) = ?
11/12 + (-2/3) = ?
What is the difference between an irrational number and an integer?
A length of ribbon is three and one-half yd long. How many pieces one and five-ninths yd long can Joy cut from the length of ribbon? (1 point)
How do you solve these problems?
I'll do the first one.
-1/9 + (-5/7) =
First, find the common denominator.
1/9 = 7/63
5/7 = 45/63
-7/63 + (-45/63) = -52/63
I'll be glad to check your answers for the other problems.
Thanks! but i still don't understand how you got 7/63 in the first step. So is there any way you could show me how to do the second one step-by-step?
1/9 = 7/63
I multiplied both the numerator and denominator by 7.
Study this site for how to find the least common denominator.
Thanks! I still can't figure out what is the difference between a irrational number and an integer... do you know help please
thanks so much! Those sites really helped! Can you help me solve this problem:
A length of ribbon is 3 1/2 yd long. How many pieces 1 5/9 yd long can Joy cut from the length of ribbon? (1 point)
The easiest way is to change these to improper fractions.
3 1/2 = 7/2
1 5/9 = 14/9
(7/2) / (14/9) =
(7/2) * (9/14) = 63/28 = 2.25
She can cut two pieces of ribbon from this length.
Thanks sooo much I understand it now!!!!
And you're welcome.
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