Idiot\'s Guides Basic Math and Pre-Algebra

Chapter 2: Arithmetic 29 you already had. You’ve got 18 ones. Deal them out into the 9 piles, and each pile will get 2 ones. Eac ...

30 Part 1: The World of Numbers 738 z 9 = 82. You can drop that zero in the front, and in the future, you can just leave a blank ...

CHAPTER 3 Order of Operations and Integers In This Chapter The rules for the order of operations Using grouping symbols to make ...

32 Part 1: The World of Numbers Order of Operations ............................................................................ ...

Chapter 3: Order of Operations and Integers 33 MD: Multiply and Divide, moving from left to right AS: Add and Subtract, moving ...

34 Part 1: The World of Numbers Ready for a more complicated problem? Try this example. Example 2: 7 v 20 – 2 v 4 + 3^2 + 12 z 4 ...

Chapter 3: Order of Operations and Integers 35 Now work on the problem inside the brackets: 120 – 2(7)^2 + 12. Follow the order ...

36 Part 1: The World of Numbers The Distributive Property Occasionally, when you’re following the order of operations, you many ...

Chapter 3: Order of Operations and Integers 37 When you see a minus sign in front of parentheses, as in 14 – (8 + 3), it says to ...

38 Part 1: The World of Numbers MATH TRAP Try to get in the habit of calling a number less than zero “negative” rather than “min ...

Chapter 3: Order of Operations and Integers 39 DEFINITION The number line is a line divided into segments of equal length, label ...

40 Part 1: The World of Numbers Arithmetic with Integers ....................................................................... ...

Chapter 3: Order of Operations and Integers 41 But what if things were reversed and you gained 3 yards and then lost 14 yards? T ...

42 Part 1: The World of Numbers To subtract signed numbers: Leave the first number as is. Change to addition. Change the second ...

Chapter 3: Order of Operations and Integers 43 To multiply signed numbers, multiply the absolute vales and follow these rules fo ...

44 Part 1: The World of Numbers CHECK POINT Complete each division problem. 49 z -7 -125 z -15 -27 z 9 34. 120 z -6 35. -981 z ...

CHAPTER 4 Factors and Multiples In This Chapter How to recognize mul- tiples of a number Finding factors of a number Identifyin ...

46 Part 1: The World of Numbers Prime Numbers When you multiply 1 by any number, the product is that number. 1 v 4 = 4, 1 v 17 = ...

Chapter 4: Factors and Multiples 47 MATH TRAP Most people think 1 is a prime number. Most people are wrong. It’s understandable. ...

48 Part 1: The World of Numbers There are a few shortcuts, like recognizing even numbers (numbers that end in 0, 2, 4, 6, or 8) ...