Mastering Decimal Word Problems

The video tutorial covers multiplying and dividing decimals through various word problems. It begins with an introduction to the differences between adding, subtracting, multiplying, and dividing decimals. The tutorial then solves several word problems, including dividing the cost of ice-skating among friends, calculating the cost of peaches, determining Jackie's weekly earnings, dividing a piece of wood into sections, and finding the total weight of pencils. Each problem demonstrates practical applications of decimal operations, emphasizing key concepts like aligning decimals and rounding.

What is the key difference between adding/subtracting decimals and multiplying/dividing decimals?

• Decimals are not lined up for multiplying and dividing.

• Decimals are only lined up for multiplying.

• Decimals must be lined up for all operations.

• Decimals are only lined up for dividing.

How much does each friend pay if 12 friends share a total cost of $83.40 equally?

• $7.10

• $7.00

• $6.50

• $6.95

If a group of friends pays $83.40 for admission and shares the cost equally, how can you verify the amount each person pays?

• By multiplying the amount each person pays by the number of friends.

• By dividing the total cost by the number of friends.

• By subtracting the total cost from the amount each person pays.

• By adding the amounts each person pays.

If peaches cost $2.50 per pound and you buy 3 pounds, how much do you spend?

• $7.50

• $8.00

• $7.00

• $6.50

How can you calculate the total cost if you know the cost per pound and the number of pounds?

• By multiplying the cost per pound by the number of pounds.

• By adding the cost per pound multiple times.

• By subtracting the cost per pound from the total cost.

• By dividing the total cost by the number of pounds.

Jackie earns $8.95 per hour and works 7.5 hours. How much does she earn?

• $67.10

• $67.15

• $67.13

• $67.12

When calculating earnings with decimals, why do you round to two decimal places?

• Because it makes the number larger.

• Because it makes the number smaller.

• Because money is typically represented with two decimal places.

• Because it is easier to calculate.

If a piece of wood is 33.6 feet long and you cut it into sections of 4.2 feet each, how many sections do you get?

• 9

• 6

• 7

• 8

How do you handle division when there is a decimal in the divisor?

• Move the decimal in the divisor and dividend to make whole numbers.

• Ignore the decimal.

• Only move the decimal in the dividend.

• Only move the decimal in the divisor.

If each pencil weighs 0.9 grams and there are 24 pencils, what is the total weight?

• 21.7 grams

• 21.6 grams

• 21.4 grams

• 21.5 grams