FOR STUDENTS TAKING ALGEBRA 1

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1 FOR STUDENTS TAKING ALGEBRA 1 Dear Parent & Algebra I Student, Your child will be taking accelerated Algebra 1 and will need core prerequisite skills from Pre-Algebra upon the start of the next school year. You will find a review packet of skills which each child is expected to know upon the start of the year. Students will be given a test (no calculators) on this information the second week of the school year. Teachers will go over the answers from the packet on the first week of school, but no direct instruction will occur on these concepts, as they are a review from Pre-Algebra. The following are the topics that students should know coming into Algebra 1. Integers Decimals Fractions Real Numbers Expressions Absolute Value Distributive Property Order of Operations You may also access the following websites to assist your child It is recommended that students who score between 80 to 100 continue with Algebra 1; students who score below an 80 continue in Pre-Algebra, as it is imperative for future successes in math to have essential, baseline skills. Have a great summer. Math Department

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3 Name Summer Math Packet Algebra 1 Students who have completed PreAlgebra. Integers Decimals Fractions Real Numbers Order of Operations Expressions Absolute Value Distributive Property

4 Integers Adding and Subtracting Page 2 Rules: ** If a number has no sign it means it is a positive number. ** Addition SAME SIGNS 1) Add their absolute values. 2) Attach the common signs (- 5) = -(4 + 5) = = 9 OPPOSITE SIGNS 1) Subtract the smaller absolute value from the larger absolute value. 2) Attach the sign of the number with the larger absolute value. 3 + (-9) = -(9 3) = = +(9 3) = 6 Subtraction 1) Adding the opposite of a number is equivalent to subtracting the number. 2) Change all problems to addition and follow the addition rules = 3 + (-12) = -(12 3) = = -7 + (-1) = -(7 + 1) = -8-4 (-10) = = +(10 4) = 6 12 ( -8) = = (-9) = = = = (-5) = = (-4) = = 9. 0 (-6) = = = (-5) = (-13) + (-4)= (-8) = (-20) = ( -32) 14 =

5 Integers Multiplying and Dividing Page 3 Rules: 1) If two numbers have the same sign, their product or quotient is positive. (-7)(-5) = = 48 2) If two numbers have opposite signs, their product or quotient is negative 9(-2) = -18 (-3)(4) = (-8)(3) = 2. (4)(-4) = 3. (20)(-65) = = = 6. = (-7) = 8. = 9. (5)(-2)(7) = 10. (-3)(-1)(4)(-6) = (-10) = 12. = 13. (11)(-1)(-7)(-3) = 14. = 15. (-72) (-12) = 16. (-9)(8)(-2)(5) =

6 Decimals Adding and Subtracting Page 4 Rules: 1) Line up decimal points, if a number does not have a decimal point it is a whole number with the decimal point at the end. 2) Annex zeros to hold place. 3) Add or subtract vertically. 4) Bring down the decimal point

7 Decimals Multiplying and Dividing Page 5 Rules: Multiplying 1) Line up digits, starting on the right. ( 6.432)(4.15) 2) Multiply (3 decimal places) 3) Place the decimal point in the answer by starting at the right x 4.15 (2 decimal places) and moving a number of places equal to the sum of the decimal places in both numbers multiplied (5 decimal places) Dividing 1) If the divisor is not a whole number, move the decimal point To the right to make it a whole number and move the decimal 5.67 Point in the dividend the same number of places. 48.) ) Divide ) Bring the decimal point up (0.5) (0.07) (0.7) (0.15)

8 Fractions Adding and Subtracting Page 6 Rules: 1) Find LCD. 2) Change to equivalent fractions. 3) Rename, if needed. 4) Add or Subtract. 5) Simplify

9 Fractions Multiplying and Dividing Page 7 Rules: 1) Change all mixed numbers to improper fractions. = 2) Multiplying across. 3) Simplify 1) Change all mixed numbers to improper fractions. 2) Take the reciprocal. 3) Multiply across. 4) Simplify

10 Real Numbers Adding and Subtracting Page 8 Use rules of integers, decimals and fractions. Examples: -4.1 (-2.51) = opposite signs subtract (-2.5) (-3.7) (-2.8) 5. (-0.8) + (-7.2) (-0.8)

11 Real Numbers Multiplying and Dividing Page 9 Use rules of integers, decimals and fractions. Examples: -4.12(-5.3) 51 (-0.25) = x ) x (-7.1) (-3.1) x (-2.1) (-0.5) )

12 Order of Operations Page 10 Parentheses (Grouping Symbols) [(7 4)² + 3] + 15 Exponents = [3² + 3] + 15 = Multiply or Divide, from left to right = [9 + 3] + 15 = Add or Subtract, from left to right = = = ² (3 + 2) [(18 6) 6] 6. 3( ) (5 3)² [10 + (5² 2)] 6 9. (9 3) ² ² ³

13 Expressions Page 11 Write the verbal phrase as an algebraic expression. Eleven less than the quantity four times a number x 4(x 11) Evaluate the expression x² + 4 x, when x = 6 6² = = 40-6 = 34 Write the verbal phrase as an algebraic expression. 1. four times a number x decreased by twelve 2. six less than double a number x 3. five squared minus a number x 4. three more than the product of five and number x 5. twenty-nine decreased by triple a number x 6. two cubed divided by a number x 7. the quotient of a number x and two-tenths 8. the difference of ten and a number x Evaluate the expression 9., when y = , when r = 30 and s = 5 11., when x = 4 and y = , when r = 6 13., when n = 14., when y =

14 Absolute Value Page 12 The absolute value of a real number is the distance between the origin and point representing the number. If a is a positive number, then a = a 12 = 12 If a is 0, then a = 0 0 = 0 If a is a negative number, then -a = a -12 = 12 x = 7, then x = 7 and -7 x = -5, then there is no solution x = x = x = x = x = x = 1

15 Distributive Property Page 13 Distributive Property Distribute

16 ANSWER KEY Page 2 Page 3 Page 4 Page Page Page Page

17 Page ½ Page ½ Page x x ² - x 4. 5x x x Page x = No solution 13. x = 4 and x = 5 and X = x = 1 and -1 Page x w y m 5. y x x x² + x 9. -9a x² + 32x t + 2t² y² - 10y x² + 16x 14. 9t w² + 3w³ 16. y³ - y²