Carefully study these sites. Then try these problems yourself.
http://www.mathsisfun.com/fractions_addition.html
http://www.mathsisfun.com/fractions_subtraction.html
1) What is 5/6 - 7/9?
2) Della wants to open a daycare center and saved 2/5 of the amount needed for start-up costs. If she saves another 1/8 of the necessary amount and then 1/6 more, find the total portion of start-up costs she had saved.
7 answers
For number 1, I can't find the matching denominator because 6 multiplied by 2 doesn't go into 9.
Multiples of 9:
9, 18, 27
Which of those is also a multiple of 6?
9, 18, 27
Which of those is also a multiple of 6?
It's 18. Do I have to multiply 6 times 3 and 9 times 2. I'm really having a hard time with this question.
Right.
Next, I have to subtract 5 minus 7 or the other way?
5/6 - 7/9
15/18 - 14/18 = 1/18
15/18 - 14/18 = 1/18
1 answer