Adding/Subtracting Fractions & Decimals

Front

What is a fraction?

Back

A fraction represents a part of a whole and consists of a numerator (top number) and a denominator (bottom number).

Front

How do you add fractions with the same denominator?

Back

Add the numerators together and keep the denominator the same. For example, 2/6 + 2/6 = (2+2)/6 = 4/6 = 2/3.

Front

What is the process for adding fractions with different denominators?

Back

Find a common denominator, convert the fractions, then add the numerators. For example, to add 1/4 and 1/6, the common denominator is 12: (3/12) + (2/12) = 5/12.

Front

What is a mixed number?

Back

A mixed number is a whole number combined with a proper fraction, such as 1 1/2.

Front

How do you convert a mixed number to an improper fraction?

Back

Multiply the whole number by the denominator, add the numerator, and place that over the original denominator. For example, 1 1/2 = (1*2 + 1)/2 = 3/2.

Front

What is a decimal?

Back

A decimal is a way of representing fractions using a base 10 system, such as 0.5 for 1/2.

Front

How do you add decimals?

Back

Align the decimal points and add as you would whole numbers, then place the decimal point in the sum.

Front

What is the sum of 2.37 and 5.8?

Back

The sum is 8.17.

Front

How do you subtract decimals?

Back

Align the decimal points and subtract as you would whole numbers, then place the decimal point in the difference.

Front

What is the result of 7.9 - 3.47?

Back

The result is 4.43.