How do you put these numbers in order from least to greatest 0.013 0.1023 0.0103 0.021?

Answer 1

It can get confusing if you have a bunch of numbers and decimals lined up like that, so when you get a problem like this, line them up vertically. It really does help.

Like so:

0.013

0.1023

0.0103

0.021

You're trying to go from least to greatest (smallest to largest), so look for the smallest numbers. Line all the ones starting with 0.0. Look at the bold numbers.

0.013

0.0103

0.021

What of the bold numbers is the largest? You might be thinking - 103 would be the biggest of the three! But remember - there is always an infinite amount of understood zeros behind that they give to you. With that knowledge, what is bigger - 103, 210, or 130? Now you can line these in increasing order.

0.0103, 0.012, 0.021, ?

Now just add the other number, which the biggest.

0.0103, 0.012, 0.021, 0.1023

PS: Always check, when you're finished, what they were asking. It's so frustrating to get a question wrong because you listed them from greatest to smallest instead of smallest to greatest!