1. Whole Number Operations Addition Rules - Line up numbers by place value - Number with most digits should be on top - Order doesn't matter - Can add more than one number at one time. - Regroup as necessary Example Subtraction Rules - Put first number on top - Line up numbers by place value - Can NOT subtract more than one number at a time - Regroup as necessary Example 45 + 193 193 Addends +45 238 Sum 305 - 79 305 -79 226 difference

2. Multiplicatio n Rules - # with most digits on top - Line up by place value - Can use * or ( ) but not x (reserved for variables) Example 742 * 1,394 or 742(1,394) 1,394 x 742 factors _ _0 __00 product

3. Division Rules - First number "gets in the house" first, so the second number is left "outside the door" - Divide thinking, "How many times does ____ go into ____?" - If you say "none", put a zero in the quotient and continue - Make sure you line up your numbers carefully! Example Summary: What did you learn about whole number operations? 53,802 / 9 Quotient 05,978 Divisor 9 53,802 Dividend -45 88 -81 70 -63 72 -72 0