Question

Solve three-sevenths plus five-ninths. Then use estimation to check for reasonableness. Show your work.

Answer 1

do you know how to add fractions ?

Answer 2

yes

Answer 3

so what did you get for 3/7 + 5/9 ??

Answer 4

8/16

Answer 5

1/7 is smaller than 1/6.
5/6 is close of a whole number, but it is missing 1/6.
Thus if we add 1/7 to 5/6, we should get a number that is ALMOST 1. ie. 42/42
Therefore by estimation, 41/42 is a correct answer.

Answer 6

3/7 + 5/9 --- common denominator is 63
27/63 + 35/63 = 62/63

estimation :
3/7 = 1/2
5/9 = 1/2

1/2 + 1/2 = 1
62/63 is very close to 1

Answer 7

so thats the answer

Answer 8

well...when you add 3/7 + 5/9 you get 62/63.....almost 1

and when you estimate :
3/7 = 1/2
5/9 = 1/2
added together = 1

I think that is how you would write the answer

Answer 9

or nah

Answer 10

thx

Answer 11

sure thing :)