In Exercises 13 40, evaluate the expression. Assume x 0.a) 5-1 b) 2-4

Review Chapter - Jan. 9th ● Adding or Subtracting reals #’s ○ Same sign: KEEP sign and COMBINE #’s ○ Different signs: take difference, use the larger value sign ● Multiplying and Dividing real #’s ○ Same sign: answer positive ○ Different sign: answer negative 1. -3 + 10 = 7 2. -11 + (15) = -26 3. 3 + (-9) = 12 4. -2/11 + 7/9 = 59/99 a. Find common denominator (11 x 9 = 99) b. Multiply 11 by 9 as well as -2 by 9 c. Multiply 9 by 11 as well as 7 by 11 That gives you -18/99 + 77/99 1. 3 x -9 = -27 2. (-5) x (-4) = 20 3. -1/4 x -2/9 = 2/36 , simplified: = 1/18 4. 4 / -2 = -2 5. -16/4 = -4 ● Keep Change Flip (K.F.C.) 6. -⅓ / ⅝ = -8/15