7.4 + 7.5 Write and Solve Multiplication and Division Equations

In 2004, Pen Hadow and Simon Murray walked 680 miles to the South Pole. The trip took 58 days. Suppose they traveled the same distance each day. Write a multiplication equation to find how many miles they traveled each day where m represents the number of miles traveled each day.

• 680 ÷ 58

• 58m = 680

• 680m = 58

• m = 680 x 58

Vincent and some friends shared the cost of a package of blank CDs. The package cost $24 and each person contributed $6. Let p represent the number of people. Write a multiplication equation to find how many people shared the cost of the CDs.

• 6p = 24

• 24p = 6

• p = 24 x 6

• 24 ÷ 6

Which one does NOT belong?

• 5x = 20

• 4b = 7

• 8w = 32

• 48 = 12y

Write a division equation that best matches this situation.

• a ÷ 7 = 3

• a ÷ 3 = 7

• 7 ÷ 3 = a

• 3 ÷ 7 = a

The weight of an object on the Moon is one sixth that of its weight on Earth. If an object weighs 35 pounds on the Moon, write a division equation to find its weight on Earth.

• w ÷ 35 = 6

• 35 x 6 = w

• w ÷ 6 = 35

• 35 ÷ w = 6

Melcker picked a total of 60 apples in 1/3 hour. Write a division equation to find how many apples Melcker could pick in one hour. Let a represent the number of apples he could pick in one hour.

• 3 ÷ a = 60

• 60 x 3 = a

• 60 ÷ a = 3

• a ÷ 3 = 60

True or False?

HINT: Try substituting in a number to x to see what happens.

• Always True

• Sometimes True

• Always False

• Cannot determine without further information