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).

Tags

CCSS.2.OA.A.1

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.

Tags

CCSS.5.NBT.B.7

Front

What does the decimal point represent?

Back

The decimal point separates the whole number from the fractional part in a decimal number.

Tags

CCSS.5.NBT.A.3A

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.

Tags

CCSS.7.NS.A.2D

CCSS.8.NS.A.1

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.

Tags

CCSS.5.NBT.A.3A

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.

Tags

CCSS.5.NBT.A.3A

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.

Tags

CCSS.5.NBT.B.7

Front

What is the result of adding 2.5 and 3.7?

Back

The result of adding 2.5 and 3.7 is 6.2.

Tags

CCSS.5.NBT.B.7

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, borrowing if necessary.

Tags

CCSS.5.NBT.B.7