Decimal Multiplication Concepts

The video tutorial explains how to multiply a positive and a negative decimal number. It begins by determining the sign of the product, which is negative due to the multiplication of a positive and a negative number. The tutorial then sets up the problem vertically and calculates the number of decimal places in the product by adding the decimal places of the factors. It proceeds to multiply the numbers as if they were whole numbers and adjusts the decimal point in the final product. The tutorial concludes by confirming the product is negative due to the initial sign determination.

What is the sign of the product when multiplying a positive number by a negative number?

• Positive

• Negative

• Zero

• Undefined

How many decimal places does the number 8.3 have?

• Three

• Two

• One

• None

How do you determine the number of decimal places in the product of two decimals?

• By dividing the decimal places

• By subtracting the decimal places

• By adding the decimal places

• By multiplying the decimal places

What is the product of 83 and 4?

• 320

• 332

• 352

• 340

What is the next step after finding the product of the whole numbers in a decimal multiplication problem?

• Add the decimal places

• Move the decimal point to the left

• Move the decimal point to the right

• Subtract the decimal places

What is the final product of 8.3 times 0.4?

• 3.32

• 33.2

• -3.32

• -33.2

Why is the final product of 8.3 times 0.4 negative?

• Because both numbers are negative

• Because 0.4 is negative

• Because 8.3 is negative

• Because the product of a positive and a negative number is negative