Mathematics in Context: More or Less

Encycbrita, "Mathematics in Context: More or Less"
Holt McDougal | 2006 | ISBN: 0030396182 | 47 pages | PDF | 2,3 MB

Dear Student,
This unit is about the ways in which fractions, decimals, and percents
are related.
Do you purchase items that need to be weighed? How is the final
price determined? Calculating per unit prices and total prices
requires multiplication with fraction and decimal numbers.
Do you buy your favorite items on sale? Next time you shop, notice
the sale discount. Sale discounts are usually expressed in percents.
In this unit, you will use fractions and percents to find sale prices.
You can use models like a double number line, a percent bar, or a
ratio table to help you make calculations.
You will investigate the percent by which a photograph increases or
decreases in size when you enlarge or reduce it on a photocopier.
You will also use fractions and percents to describe survey results.
While working on this unit, look for ads that list discounts in percents
and newspaper articles that give survey results. Share what you find
with the class.
All the situations in this unit will help you perfect your operations
with fractions, decimals, and percents. Good luck.
Sincerely,
The Mathematics in Context Development Team

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