Dec 11 Multiply and Divide Decimals Word Problems

Front

What is a decimal?

Back

A decimal is a fraction whose denominator is a power of ten, represented with a decimal point. For example, 0.5 is a decimal that represents 5/10.

Front

How do you multiply decimals?

Back

To multiply decimals, multiply the numbers as if they were whole numbers, then count the total number of decimal places in both numbers and place the decimal point in the product accordingly.

Front

What is the process to divide decimals?

Back

To divide decimals, move the decimal point in the divisor to the right until it is a whole number, then move the decimal point in the dividend the same number of places. Divide as usual.

Front

How do you round a decimal to the nearest hundredth?

Back

To round a decimal to the nearest hundredth, look at the third decimal place. If it is 5 or greater, round up the second decimal place by one. If it is less than 5, keep the second decimal place the same.

Front

What is the total cost if three friends share a $12.54 gift?

Back

Each person pays $4.18. (12.54 ÷ 3 = 4.18)

Front

If a ladder has 8 steps, each 11.5 inches long, how much wood is needed?

Back

Josh needs 92 inches of wood. (8 steps × 11.5 inches = 92 inches)

Front

How many pages does Javier read in 2.25 hours if he reads 40 pages per hour?

Back

Javier reads 90 pages. (40 pages/hour × 2.25 hours = 90 pages)

Front

How much did each pound of grapes cost if 3.05 pounds cost $3.87?

Back

Each pound costs $1.27. ($3.87 ÷ 3.05 pounds = $1.27 per pound)

Front

If Sharon spent $3.45 on sunflower seeds at $0.89 per pound, how many pounds did she buy?

Back

Sharon bought 3.88 pounds. ($3.45 ÷ $0.89 = 3.88 pounds)

Front

What is the formula for finding the total cost when sharing expenses?

Back

Total cost ÷ Number of people = Cost per person.