Decimal Operations

Front

What is a decimal?

Back

A decimal is a fraction expressed in a special form, where the denominator is a power of ten, represented with a decimal point.

Front

How do you add decimals?

Back

To add decimals, align the numbers by the decimal point and add as you would whole numbers, placing the decimal point in the sum directly below the other decimal points.

Front

What is the result of 8.5 ⋅ 2.3?

Back

19.55

Front

How do you multiply decimals?

Back

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

Front

What is the sum of 148.093 and 5.675?

Back

153.768

Front

How do you divide decimals?

Back

To divide decimals, move the decimal point in the divisor to the right until it is a whole number, and move the decimal point in the dividend the same number of places. Then divide as usual.

Front

What is 0.65 × 1.2?

Back

0.78

Front

What is the result of 5.75 ÷ 0.25?

Back

23

Front

What is the importance of the decimal point in decimal operations?

Back

The decimal point indicates the value of digits in a number, determining their place value and affecting the outcome of operations.

Front

How do you round decimals?

Back

To round decimals, look at the digit to the right of the place you are rounding to. If it is 5 or more, round up; if it is less than 5, round down.