Math Review - Place Value, Decimals, and Rounding

Math Review - Place Value, Decimals, and Rounding

Understanding Decimal Place Values

Decimals name parts of numbers that are less than one. Just like whole numbers decimals have Place Vales.

Whole Numbers Come before the Decimal Point!

• The place value of whole numbers increases as you move away from the decimal point ( from right to left)

Decimals come after the ones place!

• The place value of decimals decreases as you move away from the decimal point (from left to right)

The First Three Place Values After The Decimal Point are:

• Tenths

• Hundredths

• Thousandths

Do You See The Patter?

• The value of each place is x10 the value of the place before

• As the decimal numbers get bigger going from right to left each place has one less 0 than the value of the place to the right.

• As the decimal numbers get smaller going from left to right, the value of each place is ÷ 10 ( one tenth) of the value of the place before it has one more 0 than the value of the place to the left.

Open Ended

Write sixty tenths, sixty-two hundredths, and six hundred twenty-nine thousandths as numerals.

Open Ended

Write 0.6, 0.62, and 0.629 as a fraction.

Comparing Decimals

To compare Decimals ..... ( <,>,= )

• Look a the digits from left to right

• Then determine which one is greater than (<), less than(>),or equal to (=)

Fill in the Blank

Compare ( <,>,= ) the following two decimals :

1.) 0.356 _ 0.353

Fill in the Blank

Compare ( <,>,= ) the following two decimals :

1.) 0.350 _ 0.351

Fill in the Blank

Compare ( <,>,= ) the following two decimals :

1.) 0.256 _ 0.256