SOLUTION: Mia estimated 5/8 + 1/9 by replacing 5/8 with one and 1/9 with 0 her estimated sum was 1+0=1 explain why Mia's estimate is not accurate

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Question 944913: Mia estimated 5/8 + 1/9 by replacing 5/8 with one and 1/9 with 0 her estimated sum was 1+0=1 explain why Mia's estimate is not accurate
Found 3 solutions by Alan3354, josmiceli, MathLover1:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
5/8 is not close to 1 in this context.
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If you want to be accurate, don't estimate.
Add the 2 numbers.

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+5%2F8+=+45%2F72+
+1%2F9+=+8%2F72+
+45%2F72+%2B+8%2F72+=+53%2F72+
Note that +56%2F72+ is larger than this, and
+56%2F72+=+%28+7%2A8+%29+%2F+%28+9%2A8+%29+
+%28+7%2A8+%29+%2F+%28+9%2A8+%29+=+7%2F9+
So, +53%2F72+ is smaller than +7%2F9+,
which +2%2F9+ smaller than +1+


Answer by MathLover1(20855) About Me  (Show Source):
You can put this solution on YOUR website!


take 1%2F4 and 3%2F4; 5%2F8 is somewhere in between
1%2F4+%3C=+5%2F8+%3C=+3%2F4, so round it to 1%2F2
1%2F9+%3C+1%2F4, so round it to 0
Answer:
we are estimating that 5%2F8+%2B+1%2F9 is approximately
1%2F2+%2B+0+=+1%2F2