2b) No Decimals in Fractions!

2b) No Decimals in Fractions!

Today's lesson is that we do not want any decimals in fractions.

We will also practice simplifying fractions.

How to do remove the decimal point in a fraction?

• Count the decimal places of either the top or the bottom

• Multiply the top and bottom with 10 for removing 1 decimal place, or

• Multiply the top and bottom with 100 for removing 2 decimal places

Multiple Choice

 $\frac{2.4}{8}$  ---How do I remove the decimal point?

• x 10 to bottom

• x 10 to top

• x 10 to top and bottom

• /8 to top and bottom

Multiple Choice

 $\frac{2.4}{8}$  =? (please simplify your answer)

•  $\frac{24}{8}$  

•  $\frac{2.4}{80}$  
  

• 3

•  $\frac{3}{10}$  

Multiple Choice

 $\frac{32.4}{18}$  --How do I remove the decimal point?

• x1 to top and bottom

• x10 to top

• x10 to fraction

• x10 to top and bottom

Multiple Select

 $\frac{6}{0.5}$  ---Which 2 ways may I use to remove the decimal point?

• x 2 to top and bottom

• x 10 to top

• x 10 to top and bottom

• x3 to top and bottom

Multiple Choice

 $\frac{6}{0.5}$  = ? (Please simplify your answer)

• 12

• 60

•  $\frac{60}{5}$  
  

•  $\frac{12}{5}$  

What if both the top number and bottom number have decimal places?

• e.g.  $\frac{0.25}{0.525}$  

• Consider the number which has more decimal places

• In this example, it is the bottom number (i.e. 0.525)

• What should we do now then?

• 0.525 has 3 decimal places

•  $\frac{0.25\ \times1000}{0.525\times1000}$