Adding and Subtracting decimals

Front

What is a decimal?

Back

A decimal is a number that includes a decimal point, which separates the whole number part from the fractional part. For example, 3.14 is a decimal.

Front

How do you add decimals?

Back

To add decimals, align the numbers by the decimal point 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 value of the digit 5 in the number 3.45?

Back

In the number 3.45, the digit 5 is in the hundredths place, which means it represents 5/100 or 0.05.

Front

What is the first step in subtracting decimals?

Back

The first step in subtracting decimals is to align the numbers by the decimal point.

Front

What is 2.5 + 3.7?

Back

2.5 + 3.7 = 6.2.

Front

What is 5.6 - 2.3?

Back

5.6 - 2.3 = 3.3.

Front

Why is it important to line up the decimal points when adding or subtracting?

Back

Lining up the decimal points ensures that each digit is in the correct place value, which is crucial for accurate calculations.

Front

What does the term 'place value' mean?

Back

Place value refers to the value of a digit based on its position in a number. For example, in 4.56, the 4 is in the 'ones' place, the 5 is in the 'tenths' place, and the 6 is in the 'hundredths' place.

Front

How do you convert a fraction to a decimal?

Back

To convert a fraction to a decimal, divide the numerator (top number) by the denominator (bottom number). For example, 1/4 = 0.25.

Front

What is 0.75 + 0.25?

Back

0.75 + 0.25 = 1.00.