Decimals and Base Ten Blocks

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, 3.5 is a decimal.

Front

What are base ten blocks?

Back

Base ten blocks are physical or virtual manipulatives used to teach place value, addition, subtraction, and other mathematical concepts. They represent units, rods (tens), flats (hundreds), and cubes (thousands).

Front

How do you represent the number 4.2 using base ten blocks?

Back

You would use 4 unit blocks to represent the whole number 4 and 2 rods to represent the decimal 0.2.

Front

What does the decimal point represent?

Back

The decimal point separates the whole number from the fractional part of a number. It indicates that the numbers to the right are less than one.

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 the value of the digit 5 in the number 5.67?

Back

In the number 5.67, the digit 5 is in the 'ones' place, so its value is 5.

Front

What is the value of the digit 6 in the number 5.67?

Back

In the number 5.67, the digit 6 is in the 'tenths' place, so its value is 0.6.

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, carrying over if necessary.

Front

What is the difference between 0.75 and 0.25?

Back

The difference between 0.75 and 0.25 is 0.50.

Front

How do you round the decimal 3.76 to the nearest whole number?

Back

To round 3.76 to the nearest whole number, look at the digit in the tenths place (7). Since it is 5 or more, round up to 4.