Question

I wonder if I did #9 right and I’m having trouble with #10

Answer 1

Let's see....

QUESTION: Add. Write your answer as a mixed number in simplest form.

$6 \frac{7}{9} + 9 \frac{8}{9}$

1. Rewriting our equation with parts separated

$=6+ \frac{7}{9} +9+ \frac{8}{9}$

2. Solving the whole number parts

$6+9=15$

3. Solving the fraction parts

$\frac{7}{9} + \frac{8}{9} = \frac{15}{9}$

4. Reducing the fraction part, 15/9,

$\frac{15}{9} = \frac{5}{3}$

5. Simplifying the fraction part, 5/3,

$\frac{5}{3} = 1\frac{2}{3}$

6. Combining the whole and fraction parts

$15+1+ \frac{2}{3} =16 \frac{2}{3}$

ANSWER: $16\frac{2}{3}$

Hope that helps!

Answer 2

9
It's correct. The only problem is entering it. Is a fraction OK or do you need to break it down to 16.6666

10
I don't wonder that you are having trouble with this.

Do it in parts. 
numerator
3/4 - 3/2 = 3/4 - 6/4 = - 3/4 Notice what happened. You multiplied top and bottom of 3/2 by 2
= 3*2 = 6
2 * 2 = 4

Now do the denominator
1/4 - 3/5 = 
5/20 - 12/20
= - 7/20

What do you have?
-3/4 // - 7/20 Now invert and multiply
- 3/4 * - 20 /7
= 60/ 28
= 15 / 7 Where did the two minus' go?