Decimal Operations and Area Calculations

This lesson covers decimal points and products, focusing on multiplying numbers by one hundredth and the resulting movement of decimal points. It explains equivalent expressions, calculates values using fractions and decimals, and demonstrates how to write equivalent numerical expressions. The lesson also includes exercises on calculating sums and differences of decimals and drawing quadrilaterals with a specified area.

What is the final product when 122 and one-tenth is multiplied by one hundredth?

• 0.01221

• 1.0221

• 0.1221

• 1.221

How does multiplying a number by one hundredth affect its decimal point?

• It moves the decimal point two places to the right.

• It does not affect the decimal point.

• It moves the decimal point one place to the left.

• It moves the decimal point two places to the left.

Which expression is equivalent to six hundredths times 154 thousandths?

• 0.6 x 1.54

• 0.06 x 0.154

• 6/100 x 154/1000

• 60 x 154

What is the product of one hundredth times two hundredth?

• 0.0002

• 0.2

• 0.002

• 0.02

Calculate the value of three tenths times two-tenths.

• 0.6

• 0.006

• 0.06

• 6

What is the result of one and two-tenths times five?

• 6

• 0.6

• 60

• 0.06

What is the sum of thirty-three and one-tenth plus one and ninety-five hundredths?

• 34.05

• 35.05

• 34.5

• 35.5

Calculate the difference between thirteen and two tenths and one and seventy-eight hundredths.

• 11.42

• 12.42

• 10.42

• 11.52

What is the result of nine tenths minus 245 thousandths?

• 0.755

• 0.455

• 0.555

• 0.655

How can you draw a quadrilateral with an area of 18 square units?

• Draw a circle with radius 3 units.

• Draw a rectangle with sides 3 and 6 units.

• Draw a triangle with base 6 and height 6 units.

• Draw a square with sides 4.5 units.