Posted by Delilah on Wednesday, October 3, 2012 at 6:39pm.
1.
1/9 + (5/7) = ?
2.
11/12 + (2/3) = ?
3.
What is the difference between an irrational number and an integer?
21.
A length of ribbon is three and onehalf yd long. How many pieces one and fiveninths yd long can Joy cut from the length of ribbon? (1 point)
1
2
3
4
How do you solve these problems?

7th grade math help asap please  Ms. Sue, Wednesday, October 3, 2012 at 6:53pm
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.

7th grade math help asap please  Delilah, Wednesday, October 3, 2012 at 7:27pm
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 stepbystep?

7th grade math help asap please  Ms. Sue, Wednesday, October 3, 2012 at 7:32pm
1/9 = 7/63
I multiplied both the numerator and denominator by 7.
Study this site for how to find the least common denominator.
http://www.mathsisfun.com/leastcommondenominator.html

7th grade math help asap please  Delilah, Wednesday, October 3, 2012 at 7:41pm
Thanks! I still can't figure out what is the difference between a irrational number and an integer... do you know help please

7th grade math help asap please  Ms. Sue, Wednesday, October 3, 2012 at 7:52pm
Study these sites.
http://www.mathsisfun.com/definitions/irrationalnumber.html
http://www.mathsisfun.com/definitions/integer.html

7th grade math help asap please  Delilah, Wednesday, October 3, 2012 at 8:10pm
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)
1
2
3
4

7th grade math help asap please  Ms. Sue, Wednesday, October 3, 2012 at 8:23pm
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.

7th grade math help asap please  Delilah, Wednesday, October 3, 2012 at 8:36pm
Thanks sooo much I understand it now!!!!

7th grade math help asap please  Ms. Sue, Wednesday, October 3, 2012 at 9:03pm
Yay!
And you're welcome.

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