0.6+3.9=? quarters I think is 18 but I m not sure..I m only 10 years old.

You're right! :-)

Thank you very much!

You're very welcome!

No problem, I'm here to help you! To add 0.6 and 3.9, you'll need to line up the decimal points of the two numbers.

0.6
+ 3.9
_______

Then you can add the numbers in the same column, starting from the right. In this case, let's start with the numbers after the decimal point:

0.6
+ 3.9
_______
5

Next, look at the whole numbers (the numbers before the decimal point) and add them:

0.6
+ 3.9
_______
4

So the total, when you add 0.6 and 3.9, is 4.5.

Now, you mentioned quarters. If you want to convert this total into quarters, you need to know that there are 4 quarters in a dollar. To find out how many quarters are in 4.5 dollars, you can multiply 4 (the whole number part) by 4 (the number of quarters in a dollar) and add any additional quarters based on the fraction part (0.5).

4 x 4 = 16 quarters for the whole number part (4 dollars)
0.5 x 4 = 2 additional quarters for the fraction part (0.5 dollars)

So, 4.5 dollars is equal to 18 quarters. Well done for getting close with your initial guess of 18! Keep up the great work!