Decimal Operations

Front

What is a decimal?

Back

A decimal is a fraction whose denominator is a power of ten, represented with a dot (decimal point) to separate the whole number from the fractional part.

Front

How do you add decimals?

Back

To add decimals, line up the decimal points and add as you would with whole numbers, placing the decimal point in the answer directly below the other decimal points.

Front

What is the first step when subtracting decimals?

Back

Line up the decimals before performing the subtraction.

Front

What is the product of 0.4 and 0.3?

Back

0.4 x 0.3 = 0.12

Front

What is 0.8 multiplied by 6?

Back

0.8 x 6 = 4.8

Front

How do you multiply decimals?

Back

Multiply the numbers as if they were whole numbers, then count the total number of decimal places in both factors and place the decimal point in the product accordingly.

Front

What is the difference between 235.675 and 10.45?

Back

The difference is 225.225.

Front

What does it mean to line up decimals?

Back

Lining up decimals means to align the numbers vertically so that the decimal points are in the same column, making it easier to add or subtract.

Front

What is the area of a rectangle?

Back

The area of a rectangle is calculated by multiplying its length by its width.

Front

What is the value of 3.5 + 2.7?

Back

3.5 + 2.7 = 6.2