Where to stop when doing decimal division? We know

nevinijifg8

nevinijifg8

Answered question

2022-03-12

Where to stop when doing decimal division?
We know that 18=0.125 via calculator; however, if I didn't have access to a calculator and wanted to find this via long division, why would I stop at 3 decimal places? Why not 2 or 4?

Answer & Explanation

suboctavaja5

suboctavaja5

Beginner2022-03-13Added 6 answers

Step 1
If I understood your question, you are searching for a method to make a division without a calculator. Similar to Miscellaneous answer, in the case of 18 this is what I would do:
You can write the rational like this:
18=1222=1222
This means that you need to take the mid part of a number three times, so
12=0.5
0.52=0.25
0.252=0.125

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