Practical Applications of Arithmetic

This video tutorial covers lesson 4.3 on multiplication with decimals and whole numbers. It includes a series of multiplication problems, each solved step-by-step, and applies these skills to real-world scenarios. The video also compares different methods for multiplying decimals and whole numbers, emphasizing the importance of decimal placement. A lesson check and spiral review reinforce the key concepts taught.

What is the key concept to remember when multiplying decimals and whole numbers?

• Always round the result to the nearest whole number.

• Ignore the decimal point during multiplication.

• Ensure the decimal point is correctly placed in the product.

• Multiply only the whole number part.

What is the product of 5.2 and 4?

• 20.8

• 23.8

• 21.8

• 22.8

In the multiplication of 9.8 and 6, what is the correct placement of the decimal in the product?

• 0.588

• 58.8

• 5.88

• 588

What is the result of multiplying 2.18 by 7?

• 15.12

• 15.2

• 15.22

• 15.26

How do you calculate the total length of nine half-dollar coins lined up end to end, each measuring 30.61 mm?

• Multiply 30.61 by 9

• Add 30.61 nine times

• Divide 30.61 by 9

• Subtract 30.61 from 9

If one pound of grapes costs $3.49, how much do 3 pounds cost?

• $10.47

• $9.47

• $11.47

• $12.47

How many ounces of turkey does Pete need for three sandwiches, each containing 3.5 ounces?

• 10.5 ounces

• 12.5 ounces

• 9.5 ounces

• 11.5 ounces

What is the total cost of 9 gallons of gasoline at $3.37 per gallon?

• $33.33

• $32.33

• $31.33

• $30.33

How many cards will each person receive if 5 people share 362 baseball cards equally?

• 73 cards

• 70 cards

• 71 cards

• 72 cards

What is the total distance Sarah rides to and from school each day if she rides 2.7 miles to school and 2.5 miles back?

• 5.3 miles

• 5.2 miles

• 5.1 miles

• 5.0 miles