Decimal Computation Review

Front

What is a decimal?

Back

A decimal is a way of representing fractions using a point (.) to separate the whole number part from the fractional part.

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 sum directly below the other decimal points.

Front

How do you subtract decimals?

Back

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

Front

What is multiplication of 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 division of decimals?

Back

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

Front

How do you estimate the sum of decimals?

Back

To estimate the sum of decimals, round each decimal to the nearest whole number and then add those rounded numbers.

Front

How do you estimate the difference of decimals?

Back

To estimate the difference of decimals, round each decimal to the nearest whole number and then subtract the rounded numbers.

Front

What is the purpose of rounding decimals?

Back

Rounding decimals simplifies numbers to make calculations easier and helps in estimating results.

Front

How do you convert a fraction to a decimal?

Back

To convert a fraction to a decimal, divide the numerator by the denominator.

Front

What is the relationship between decimals and percentages?

Back

Decimals can be converted to percentages by multiplying by 100 and adding a percent sign (%).