1-8 Negative Numbers Give a number that is between two negative numbers. Round negative numbers up or down or to the nearest value of a decimal place. Enter negative numbers on a calculator. Convert negative mixed numbers to decimals. Correctly interpret situations with two directions as positive, negative, or corresponding to zero. Graph and read negative numbers on a number line. Is the price right? When you go shopping, the amount you pay for items must be greater than the store owner's cost in order for the store to avoid losses and remain in business. What number would represent... make $3 make $2 make $1 make $0.50 break even lose $1 lose $1.50 lose $2 lose $3 10 8 9 1 0 2 3 4 5 6 7 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 PROFITS LOSSES BREAK EVEN
+ above gain increase deposit - below loss decrease withdrawl **Write this in your notebook** Today's Date: 9-21-10 Section 1-8
**Put the definitions of negative numbers & integer in your notebook!** Negative numbers - uses (-) sign; (-) sign means "opposite of" For example, The opposite of making $1.50 is losing $1.50 similarly, The opposite of 1.50 is -1.50. Integer - whole numbers & their opposite
Where else have you seem opposites used?
Represent each situation with a positive or negative number. 1. In golf, a score used as a standard is called par. name an integer that represents each of the following golf scores. a. 6 strokes below par b. three over par c. even with par 2. A space shuttle is to be launched. Represent each of these times (in seconds) by positive or negative numbers. a. 4.3 seconds before launch b. 1 minute after the launch c. the time of the launch 3. Write a number to represent the depth of the Marianas Trench, the deepest part of the Pacific Ocean. It is about 36,200 feet below sea level. 4. Next to a bowler's name on TV is the number -8. Is the bowler ahead or behind?
Convert to a decimal & round negative numbers. 5. The elevation of some parts of New Orleans are 2 feet below see level. a. Write this number to show that the elevation is below sea level. b. Write this number as a decimal. c. Round this number to the nearest foot. 6. The price of a share of stock went down 1 dollars. a. How will this be written on the stock market pages of a newspaper? b. Write the answer to part a as a decimal. c. Round the answer to part b to the nearest penny.