3 rd Period – Wednesday, January 18 th 4 th Period – Thursday, January 19 th

Add, subtract, multiply, and divide whole numbers, fractions, and decimals in word problems. Will involve tax, percentages off, one and two step problems, etc. “Shirt cost $20 with 9% tax” $ = $1.80, so $20 + $1.80 = $21.80 Factors and Multiples Factors of 8: 1, 2, 4, 8 Multiples of 8: 8, 16, 24, 32, etc.

Lowest Common Multiples Find the LCM of 6 and 4: 6: 6, 12, 18, 24, 30, 36, … 4: 4, 8, 12, 16, 20, 24, 28, … Greatest Common Factor Find the GCF of 12 and 20: 12: 1, 2, 3, 4, 6, 12 20: 1, 2, 4, 5, 10, 20

Place Value Find the place value of the digit 5 in the number 12,536, The 5 is in the hundred thousands place. Rounding Round 14,564 to the nearest thousand. Look at the number to the right. It is 5 or higher, so you round up. The answer is 15,000!

Ordering Order 0.5, 0.53, and from smallest to largest: Add ‘0’ to make them look similar , 0.530, and 0.506, so… The answer is 0.5, 0.506, 0.53 Simplifying Fractions Reduce to lowest terms ÷ 5 = 3 20 ÷ 5 = 4

Common Conversions How many cups in 2 quarts? (1 qt = 2 pints, 1 pint = 2 cups) 2 qts = 4 pints, 4 pints = 8 cups Mean, Median, and Mode Mean = average – add and then divide Median = order from least to greatest, find middle number. Mode = the number that appears the most.

Mean – Missing Value Your first three test scores are 79, 88, and 80. What must you score on the next test to achieve an 85 average? 85 4 = 340 pts needed = 247 pts currently have You need 340 – 247 = 93 on the next test. Reading Tables and Charts You will be asked to make simple computations from information given on a chart or table.

Writing Expressions and Equations “three less than the product of two and x” 2x – 3 “Chris is one year more than twice as old as Tom. Chris is 15 years old. How old is Tom?” 2t + 1 = 15 2t = 14 t = 7 years old

Simplifying Expressions Simplify: 3x – 5 + 4x + 9 7x + 4 Solve Equations 3x + 6 = 18 3x = 12 x = 4 Plot points on a Coordinate Plane (x, y) – x-coordinate is plotted side to side y-coordinate is plotted up and down

Graph an Equation on a Coordinate Plane y = 2x – 2 xy

Find Slope (m) m = y 2 – y 1 x 2 – x 1 Find the slope of the line going through (3, 5) (4, 9) 9 – – 3 1 m = = = 4

Find Equation of a Line given: m & b, m & one-point, and two-points 1. m = 3, b = -5 y = 3x – 5 2. m = 2 (2, 8) y = mx + b 8 = 2(2) + b 8 = 4 + b 4 = b, so y = 2x (2, 5) (4, 13) 13 – – 2 2 m = = = 4 m = 4, (2, 5) 5 = 4(2) + b 5 = 8 + b -3 = b y = 4x – 3

Use the Distance Formula √(x 2 – x 1 ) 2 + (y 2 – y 1 ) 2 Use the Midpoint Formula x 1 + x 2 y 1 + y (, )