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Explain how to do this problem the easy way my teacher didnt teach us this much of it

Explain how to do this problem the easy way my teacher didnt teach us this much of-example-1
User Sarego
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1 Answer

3 votes
Let’s make a number line

0. 1/5. 2/5. 3/5. 4/5. 1
——————————————

4/5 is closer to 1 so we can round it to 1.

1 8/9 can be separated into 1 + 8/9

Here is another number line

0. 1/9. 2/9. 3/9. 4/9. 5/9. 6/9. 7/9. 8/9 1
—————————————————————

8/9 is closer to 1, so we can round it to 1.

Now we have 1+1 = 2

The question asks us to multiply both fraction using the estimations.

So instead of,
4/5 x 1 8/9.

We use
1 x 2,
Which is =2

(So the answer is 2 or b)
User Joon Hong
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8.4k points