Area of Parallelograms and Decimals

Mr. Richards reviews grade six practice problems focusing on decimal points in products. The lesson covers multiplying decimals by 1/100, identifying expressions with equivalent values, and calculating decimal products. It also includes a review of decimal addition and subtraction, emphasizing the importance of aligning decimal points and using placeholders. The lesson concludes with a discussion on calculating the area of parallelograms, highlighting the relationship between base and height.

What happens to the decimal point when you multiply a number by 1/100?

• It stays the same.

• It moves one place to the left.

• It moves two places to the left.

• It moves two places to the right.

Which expression is equivalent to six hundredths times one hundred fifty-four thousandths?

• 6 x 154

• 0.6 x 154

• 6 x 0.154

• 0.06 x 0.154

How do you express 100 times two hundredths as a fraction?

• 20/1,000

• 200/10,000

• 2/10,000

• 2/100

What is the decimal equivalent of 12 tenths times 5?

• 1.2

• 6

• 60

• 0.6

How can you express four times 10,000 times five times 1,000?

• 20/10,000,000

• 20/10,000

• 20/100,000

• 20/1,000,000

When adding decimals, why is it important to line up the decimal points?

• To make subtraction easier.

• To ensure the numbers are added correctly.

• To avoid using placeholders.

• To make the numbers look neat.

What is the result of 10 minus 8 in decimal subtraction?

• 4

• 1

• 2

• 3

What is the formula for the area of a parallelogram?

• Base - Height

• Base / Height

• Base x Height

• Base + Height

Which of the following is a correct base-height pair for a parallelogram with an area of 18 square units?

• 3 and 5

• 1 and 18

• 4 and 4

• 2 and 8

What is the area of a parallelogram with a base of 2 and a height of 9?

• 18 square units

• 24 square units

• 20 square units

• 22 square units