Question

Estimate the sum. 6 1/5 plus 3 8/9 a.11 b.9 c.10 d.12

Answer 1

Hey there!

"Sum" means to add, so let's add the two fractions:

6 + 3 = 9

Find the LCD of both fractions . . .

1/5 = 9/45

8/9 = 40/45

9 + 40 = 49

= 49/45

Simplifying 49/45 . . .

49/45 = 1 4/45

1 + 9 = 10

= 10 4/45

6 1/5 + 3 8/9 = 10 4/45, but as an estimate the best answer will be 10. <---

Your answer is option "C."

Hope this helps you.
Have a great day! :)

Answer 2

Hello there!


Question. 

Estimate the sum. 6 1/5 + 3 8/9


Answer:

1.) Make both the denominators the same which the common denominator is 45.

45 ÷ 5 = 9 
so, carry 9 to the numerator

9 x 1 = 9 

= 6 9/45

45 ÷ 9 = 5
so, carry 5 to the numerator and multiply it by 8.

5 x 8 = 40

= 3 40/45


2.) Then, add the equation:

6 9/45 + 3 40/45

3.) Simplify:

9 49/45

= 10 4/45 

4.) Estimate it: 

≈ 10 
which is C. 



Hope this helped!

~Shane