Unit 4: Decimals, Percents and Ratios.
Section 11: Decimals
- Represent decimals in several ways
- Compare and convert fractions and decimals
- Add and subtract with decimalsmm
- Multiply and divide with decimals
Representing and comparing of decimals
D2L->Content->Readings, read the
article "Investigating Students' Conceptual Understanding of Decimal
Fractions Using Multiple Representations"
Assignment due Aug 10:
Assn 52: Draw or otherwise produce
showing each of these decimals
a. in a grid
b. with base 10 blocks
c. on a number line.
d. tell what length in centimeters or millimeters each represents if 1
means 1 m. (tell, don't draw)
(For example, in #1d, you should do:
0.68m=?cm or 0.68m=?mm--choose which ever of cm or mm makes the
most sense to use for the given amount)
Fractions and decimals
Using a grid to convert fractions to decimals involves using a decimal grid, subdividing it into the appropriate fraction and then using the original grid to figure out the decimal representation for the amount.
Using division to convert
fractions to decimals
Operations on decimals: