Math Final

Hey class!! Earlier Antonia asked if this was all you need to study... so, I'm going to tell you exactly what is on your math exam right now!

1. You need to write decimal numbers in word form. (example: 324.42 is three hundred twenty four AND forty-two hundredths)

2. You need to know the value of a digit in a decimal number. For example, in 3.456, the 4 is worth 4 tenths, the 5 is worth 5 hundredths, and the 6 is worth 6 thousandths.

3. You need to compare decimal numbers using <,>, or =. For example, 3.5 = 3.50, but 3.5 > 3.05, and 3.5 < 2 =" 6." style="display:block; margin:0px auto 10px; text-align:center;cursor:pointer; cursor:hand;width: 500px; height: 500px;" src="http://upload.wikimedia.org/wikipedia/commons/thumb/4/4f/PieChartFraction_threeFourths_oneFourth-colored_differently.svg/500px-PieChartFraction_threeFourths_oneFourth-colored_differently.svg.png" border="0" alt="">

10. You need to be able to write a fraction in the simplest form. Here's an example:


11. You should understand the difference between irregular fractions and mixed numbers.

This picture shows a mixed fraction, 2 1/3:


12. You need to be able to make irregular fractions into mixed numbers and mixed numbers into irregular fractions. To make an irregular fraction a mixed number, you divide the top number (the numerator) by the bottom number (the denominator). So, 10/5 would be 10 divided by 5, which equals 2. 12/11 would be 12 divided by 11, which equals 1 with a remainder of 1, so the answer would be 1 1/11.

To make a mixed number an irregular fraction, you multiply the bottom number times the whole number and add the top number. So, 1 2/3 is 3x1 +2, which equals 5/3.

13. You need to be able to compare fractions using <, >, and =. So, which is bigger 1/2 or 2/3? You need to find a common denominator (use six for this problem). Multiply 1/2 by 3 and 2/3 by 2. You get 3/6 and 4/6. That means 2/3 > 1/2.

14. You need to be able to change decimal numbers into fractions. For example, 0.25 is 25/100, and that can be simplified to 5/20, which can be simplified to 1/4. (Or you can divide 25/100 by 25 and get 1/4!)

I'm posting the answers to the review in just a minute!