Mastering Multiplication of Whole Numbers and Decimals

What is the first step in multiplying a whole number by a decimal?

• Multiply as usual and then adjust the decimal.

• Remove any decimals and rewrite the problem.

• Place the decimal in the product immediately.

• Count the number of digits after the decimal in both numbers.

In the example of 14 times 6.10, what is the product before adjusting for the decimal?

• 0.84

• 84

• 8.4

• 840

How do you determine where to place the decimal in the product?

• By counting the total number of digits in the problem.

• By adding the number of digits after the decimal in both numbers.

• By counting the number of digits after the decimal in the original problem.

• By guessing based on the size of the numbers.

What is the correct product of 14 times 6.10?

• 84

• 8.4

• 0.84

• 840

What is the purpose of circling digits to the right of the decimal in the original problem?

• It's just a visual aid and has no mathematical purpose.

• To ensure all digits are included in the multiplication.

• To determine how many zeros to add to the product.

• To decide where to place the decimal in the product.

When multiplying 7 by 5.22, what is the first step according to the video?

• Remove any decimals and rewrite the problem.

• Place the decimal in the product.

• Count the digits after the decimal.

• Multiply as usual.

Why is it easier to have the number with more digits on top when multiplying?

• It makes the problem easier to visualize.

• It's a requirement for multiplication.

• It results in a smaller product.

• It's purely a preference and doesn't affect the outcome.

What principle allows us to multiply numbers in any order?

• Associative property

• Commutative property

• Identity property

• Distributive property

What is the final product of 7 times 5.22?

• 36.54

• 3654

• 365.4

• 36.554

How many digits should be behind the decimal in the product of 7 times 5.22?

• Three

• One

• Two

• None