Decimals: Addition, Subtraction, Multiplication & Division

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 whole numbers, placing the decimal point in the sum directly below the other decimal points.

Tags

CCSS.5.NBT.B.7

Front

What is the process for subtracting decimals?

Back

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

Tags

CCSS.5.NBT.B.7

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.

Tags

CCSS.6.NS.B.3

Front

What is the rule for dividing 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.

Tags

CCSS.5.NBT.B.6

CCSS.6.NS.B.2

Front

What is the value of 0.5 + 0.75?

Back

0.5 + 0.75 = 1.25.

Tags

CCSS.5.NBT.B.7

Front

What is the value of 3.2 - 1.5?

Back

3.2 - 1.5 = 1.7.

Tags

CCSS.5.NBT.B.7

Front

What is 2.5 x 4?

Back

2.5 x 4 = 10.

Tags

CCSS.6.NS.B.3

Front

What is 6.4 ÷ 0.8?

Back

6.4 ÷ 0.8 = 8.

Tags

CCSS.5.NBT.B.7

Front

How do you find the change from a purchase?

Back

To find the change, subtract the total cost from the amount paid. For example, if you pay $20 for an item that costs $18.77, the change is $20 - $18.77 = $1.23.

Tags

CCSS.5.NBT.B.7