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UNIT 1
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CHAPTER 1 Add and Subtract Decimals
What Do I Need to Know?
Jill Bakken and Vonetta Flowers won the gold medal in the women's bobsled race at the 2002 Winter Olympics with a two-run time of 1 minute 37.76 seconds. How would you say their time in words?
VOCABULARY
place
value
standard form
expanded form
whole number
decimal
equivalent decimals
inverse operations
What Will I Learn?
In this chapter you will learn to
understand, compare, and order whole numbers and decimals.
add and subtract whole numbers and decimals.
round numbers to a given place.
estimate sums and differences.
use skills and strategies to solve problems.
How Do I Read Math?
When you read a mathematics book, sometimes you read words and symbols and sometimes you read only symbols.
All of these represent 2.3 minus 1.6:
1.6 less than 2.3
2.31.6
Use your Foldables to help you with chapter concepts.
1.
Fold a sheet of 11-by-17 inch paper like a shutterfold.
2.
Staple five sheets of notebook paper inside the shutterfold, and label each with a lesson title.
3.
Write "DECIMALS" on the front of the Foldables, and record what you learn inside as shown.
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