Unformatted text preview: Chapter 4 123.456789
Give the place value of the 3
a) 12.351
b) 1.43 c) 30.002 d) 0.123456 What is the difference between "twenty one year olds" and "twentyone year olds" ?
What is the difference between "six ten thousandths" and "six tenthousandths"? In Words
52.543201 48.512 589,123.0546 2.09 2.009 101.002003 e)0.56730987 Three hundred two and three thousandths Negative Four thousand and three hundredths One hundred million, thirtythree thousand, five hundred eleven Thirtytwo million, twenty thousand, five and three thousand, two hundred three tenthousandths Two hundred thousand and four hundredthousandths Decimal to Fraction: Write the following fractions as decimals: 1.23 8.57 10.99 0.58 Rounding to the nearest?
Round to the nearest thousandth.
1) 234,123.5643 2) 0.2345 3) 1009.009 4) 1.2353363333 3) 1009.009 4) 1.2353363333 2) 0.2345 3) 1009.009 4) 1.2353363333 2) $0.2345 3) $1009.009 4) $1.2353363333 Round to the nearest hundredth
1) 234,123.5643 2) 0.2345 Round to the nearest whole number 1) 234,123.5643 Round to the nearest cent 1) $234,123.5643 Adding Whole Numbers + 1 + 3 4
The number in front tells you how many you have.
So, one apple plus three apples is four apples. Remember thisthe + means you can only count or remove your like terms, that is all. A) 5 + B) 4 X + 7 X
D) 63 22 3 4.3258.123+52 Five different things. What are they? 4.3258.123 Five different things. What are they? Multiplying
1. Multiply
2. Count the number of decimal places in both numbers.
3. Give the product that number of decimal places.
2.04
× 1 .3 The number of decimal places for the product is _______. Two from the first number and one from the second
number. Evaluate: 1) (
2) ) Dividing
1. If dividing by a decimal, then move the decimal place to the right in both numbers until there are no
decimal places on the outside number(the divisor).
2. Place a decimal on the line above the other decimal.
3. Divide as before until you have a remainder of zero, repeating digits, or it asks you to round. If the
digits repeat, then place a bar over the repeating digits.
.
The outside number had one decimal place. So we had to move the decimal to
1.3 3.328
13 33.28
the right one place in both numbers. Divide 3 25 Round to the nearest hundredth 13 200 Power of 10
2.33 10 2.33 100 2.33 10,000 2.33 10 2.33 100 2.33 100 ,000 Converting fractions to decimals: Converting decimals to fractions (review): Solving Equations 0.3x 0.18 Simplify
(simplify each side)
c) Remove decimals Multiply by powers of ten 1) 0.4 x 5.73 2) x 3.2 2.3 3) t 3
8.1 Applications:
The average acceleration of an object is given by a= , wher ea is the average acceleration, v is the velocity,
and t is the time. Find the velocity after 3 seconds of an object whose acceleration is 16 ft/sec squared. D rt C 5
F 32
9 profit= revenuecost Retail price = cost + markup 1) Find the distance covered by a jet if it travels for 3.5 hours at 550 mph. 2) Find the Celsius temperature reading if the Fahrenheit reading is 89.3 ? 3) For the month of June, a florist’s cost of doing business was $3758.95. If June’s revenues totaled $5,115.22,
what was her profit for the month of June? 4) You find a shoe for $1.33 at a yard sale and want to sell it with a markup of $2.55. What is the Retail or
selling price? 5) The markup on a refrigerator is $523.44. If the selling price is $1045.66, then what is the dealers cost? SQUARE TO SQUARE ROOT 22 42 33 9 3 44 16 4 55 25 66 36 77 49 88 64 99 81 10 10 100 11 11 121 12 12 64 0.64 64
25 1
4 25
64 9
81 6 81 5 1 Approximate using your calculator:
√ √ Radical Land
32 108 50 250 81 5 99 625 42 NATURAL NUMBERS (counting numbers) 1, 2, 3, 4, 5,… 1234567891 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, … WHOLE NUMBERS 0 1 2 3 4 5 6 7 8 9 10 INTEGERS…3, 2, 1, 0, 1, 2, 3, …
6 5 4 3 2 1 0 1 2 3 4 5 6 7 8 9 10
RATIONAL NUMBERS Integers, Repeating and ending Decimals, and Fractions 3, 2 5.5 0 7
, 0, 3, 5.7, 4.33333…
8 1
1
2 IRRATIONAL NUMBERS
Decimals that don’t repeat or end. We don’t know exactly where they are on the number line. Like radicals,
1.235698425624… there is no pattern. REAL NUMBERS
RATIONAL , All of the previous numbers
INTEGERS WHOLE NUMBERS NATURAL REAL
IRRATIONAL
So all natural numbers are whole numbers, all whole numbers are integers, all integers are rational, and all rational are real. The real
numbers are all the numbers on the real number line. 2, 3, 1, 0.5, 234.12, 0, 3, List all of the numbers that are:
1) whole numbers 2) Integers 3) Irrational 4) Rational 5) Real Plot the following: Whole numbers: plot 2 Plot 5 Decimals: Plot 5.6 plot 2.3 Fractions: plot Plot Linear Inequalities
, <,> x4
Graph
Interval notation 1) x2 Interval notation
2) x6
Interval notation x>5 x<0 ...
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This note was uploaded on 01/13/2012 for the course MATH 30 taught by Professor Ianmccance during the Spring '12 term at Harvard.
 Spring '12
 IanMcCance

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