Adding and Subtracting Decimals

Front

What is a decimal?

Back

A decimal is a fraction whose denominator is a power of ten, represented with a dot (decimal point) separating the whole number 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 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 whole numbers, placing the decimal point in the difference directly below the other decimal points.

Front

What is the value of 0.5 in cents?

Back

0.5 in cents is 50 cents.

Front

What is the change received when paying $20 for an item costing $6.43?

Back

The change received is $13.57.

Front

If an adult's ticket costs $5.75 and the total for two tickets is $9.50, what is the cost of the child's ticket?

Back

The cost of the child's ticket is $3.75.

Front

Calculate 1.96 + 0.028.

Back

1.96 + 0.028 = 1.988.

Front

If Mrs. Coll has a $10.00 gift card and spends $1.56, how much is left?

Back

Mrs. Coll has $8.44 remaining on her gift card.

Front

What is 87.03 + 90.9?

Back

87.03 + 90.9 = 177.93.

Front

What does it mean to round a decimal?

Back

Rounding a decimal means adjusting its value to make it simpler while keeping it close to the original value.