SOLUTION: trouble solving this... 2 1/2 + 3/4 times 2 1/2 - 3/4 I know the answer is 5 11/16 but I dont know how my teacher did this...can you show me step by step? Thank you!

Algebra ->  Numeric Fractions Calculators, Lesson and Practice -> SOLUTION: trouble solving this... 2 1/2 + 3/4 times 2 1/2 - 3/4 I know the answer is 5 11/16 but I dont know how my teacher did this...can you show me step by step? Thank you!      Log On


   

Question 993526: trouble solving this...
2 1/2 + 3/4 times 2 1/2 - 3/4 I know the answer is 5 11/16 but I dont know how my teacher did this...can you show me step by step?
Thank you!
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
You described 2%261%2F2%2B%283%2F4%29%282%261%2F2%29-3%2F4

Lowest common denominator will be 8; and you might or might not need to see how that works.

Converting mixed numbers into improper fractions.
5%2F2%2B%283%2F4%29%285%2F2%29-3%2F4

%285%2F2%29%284%2F4%29%2B%283%2A5%29%2F%282%2A4%29-%283%2F4%29%282%2F2%29

20%2F8%2B15%2F8-6%2F8

29%2F8

highlight%283%265%2F8%29

If not what you expected, then show or say exactly what you actually are starting with.

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!

trouble solving this...
2 1/2 + 3/4 times 2 1/2 - 3/4 I know the answer is 5 11/16 but I dont know how my teacher did this...can you show me step by step?
Thank you!
Why would someone try to help you and not care about getting the answer you supplied? That's so ridiculous!!

%282%261%2F2+%2B+3%2F4%29+%2A+%282%261%2F2+-+3%2F4%29

%285%2F2+%2B+3%2F4%29+%2A+%285%2F2+-+3%2F4%29

%2810%2F4+%2B+3%2F4%29+%2A+%2810%2F4+-+3%2F4%29 ------ Changing fractions to LCD, 4

%2813%2F4%29+%2A+%287%2F4%29________91%2F16, or highlight_green%285%2611%2F16%29