Divide 999 by 5 in 2 seconds
You can divide 999 by 5 in 2 seconds or less using this math trick.
999
Step 1
First you need to memorize 1.8. You get 1.8 when you divide 9 by 5.
Step 2
Leave some space between 1 and the decimal point: 1 .8
Step 3
Put 99 between 1 and the decimal point.
199.8
999 divided by 5 = 199.8
Feel free to add more 9s and still follow the three steps above to get the answer.
We can try another example with more 9s.
Divide 999999 by 5
999999 ÷ 5 = ?
Step 1
Write down 1.8
Step 2
Leave some space between 1 and the decimal point. This time you may have to leave more space since you have many 9s to put between 1 and the decimal point:
1 .8
Step 3
Put 99999 between 1 and .8
199999.8
999999 divided by 5 = 199999.8
Another trick to divide 999 by 5
The other trick that you can use to quickly perform the division is to rewrite 999 as
1000 - 1 since 999 = 1000 - 1. Then divide (1000 - 1) by 5
(1000 - 1) ÷ 5 = (1000 ÷ 5) - (1 ÷ 5) = 200 - 0.2 = 199.8
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