Multiply Rational Numbers

Multiply Rational Numbers

Multiply Decimals

Step 1- You don't have to line up decimals

Step 2 Multiply the numbers like they are whole numbers

Step 3 Count the number of spaces after the decimal point on each value, add the numbers, the sum will determine the number of spaces after the decimal point to find your product

Multiple Choice

When multiplying 17.98 × 143.5, how many times would you move the decimal?

• 1 time to the left
• 2 times to the left
• 3 times to the left
• 4 times to the left

Multiple Choice

If you multiply 0.73 by 2.52, how many times would you move the decimal?

• 2 times to the left
• 3 times to the left
• 4 times to the left
• 5 times to the left

Multiple Choice

4 x 0.03

• 12
• 0.12
• 120
• 0.012

Multiple Choice

11.3 × 2.5

• 79.1
• 13.8
• 22.597
• 28.25

Multiple Choice

A gallon of water weighs 8.35 pounds.  Simon uses 11.8 gallons of water while taking a shower.  How many pounds of water did Simon use?

• 98.53
• 23.38
• 20.33
• 96.4

Multiple Choice

Tricia's garden is 9.87 meters long and 1.9 meters wide.  What is the area of her garden?

• 11.77
• 18.753
• 18.694
• 12.547

Multiply Fractions

Step 1 Multiply the numerator by the numerator and the denominator by denominator

Step 2- Simplify if possible

Same rules apply for multiplying positive and negative(Count the signs odd- negative even positive)

Multiple Choice

Multiply and simplify if possible.

• - ¹ / ₁ ₈
• ¹ / ₁ ₈
• - ⁴ / ₉
• 3 ⁵ / ₇

Multiple Choice

Multiply and simplify if possible.

• - ¹ / ₉
• ¹ / ₉
• - 9
• 9

Multiple Choice

Multiply and simplify if possible.

• ⅝
• ¼
• 2 ⅓
• ⅘

Multiple Choice

George has 1/3 pan of brownies. He eats 1/4 of them. What fraction did George eat?

• 1/7
• 1/4
• 1/3
• 1/12

Multiplying Mixed Numbers

Step 1 Convert the mixed number into improper fraction

Step 2 Multiply the numerator by the numerator and the denominator by the denominator

Step 3 Simplify if possible

Multiple Choice

What is the product of 2 1/2 x 3/4 in simplest form?

• 1 5/8

• 2 5/8

• 1 7/8

• 7/8

Multiple Choice

What is the product of 24 and 1/8?

• 24/192

• 24/8

• 24 1/8

• 3

Multiple Choice

Sharon is making cookies. Her recipe calls for 2 1/4 cups of flour. She wants to make 3 1/2 times the recipe. How much flour will she need?

• 6 1/8 cups

• 6 3/4

• 63/8

• 7 7/8 cups

Multiple Choice

Tony's recipe for soup calls for 1 1/4 teaspoons of salt. He wants to use 1/2 that amount. How much salt will he use?

• 3/8 teaspoon

• 5/8 teaspoon

• 3/4 teaspoon

• 1 teaspooon