1. Subtraction Equations SWBAT solve subtraction equations using the addition property of equality when the minuend is unknown; solve subtraction equations using the addition property of equality when the subtrahend is unknown

2. Solving Equations  What are the 2 rules you need to remember when solving equations? –Keep it balanced!! –Isolate the variable  What is the inverse (or opposite) operation of subtraction? (How do you un-do subtraction) –Addition

3. Fact Families  2 + 4 = 6  6 – 2 = 4  6 – 4 = 2  4 + 6 = 10  10 – 4 = 6  10 – 6 = 4  a + b = c  c - b = a  c - a = b

4. Examples  x – 1456 = 234  58 – z = 29  p – (183 + 8462) = 135  8.7 = e – (107 + 14.3)  17.82 – b = 17.82

5. Try the problems on your paper  t = 19.311  c = $3.81  b = 4.15  f = 55,317  s = 1594