HALLOWEEN MATH MYSTERY

HALLOWEEN MATH MYSTERY

UNIT RATES

• 10 ROOMS/2 FLOORS = 5 Rooms per Floor

• 882 students/21 buses = ? per bus

• Divide!

• 882/21 = 42

PERCENT OF NUMBERS

• 50% 0F 120

• X/120 = 50/100

• CROSS MULTIPLY

• 120 x 50=6000 100 x X=100X

• 100X=6000

• Get X by itself by dividing both sides by 100!

• x=60

GREATEST COMMON FACTOR

• 9 = 1, 3, 9

• 18 = 1, 3, 6, 9

• 9 is the GCF

Adding and Subtracting Fractions

• 5/6 + 2/3

• You have to find a common denominator!

• 2/3 = 4/6

• 5/6 + 4/6 = 9/6

• Don't leave it as an improper fraction!

• 9/6 - 6/6 = 1 3/6

• Don't forget to simplify! 1 1/2