Decimals and Place Value

Decimal and place value page left top graphicDecimal and place value page right top graphic

Place value tells us the mathematical value one digit of a number has to another digit of that number.

Larger Place Values are digits to the left of any digit:

Arrow shows direction of greater place value.

472

or

472.

Hundreds position number (100 x unit position)

Tens position number (10 x unit position)

Unit position number (1 x)

Moving left each place value position is 10 times greater the position to its right.

Moving right each place value position is 10 times less the position to its left.

Without a decimal a number can never be less than 1 and have value.

Smaller Place Values are digits to the right of any digit:

Arrow showing direction place value is decreasing.

.286

Tenths position (2/10)

Hundredths position (8/100)

Thousandths position (6/1,000)

Together, having place value and decimals, numbers can be as large or small as needed.

Larger

Larger place value direction arrow.

Smaller

Smaller place value direction arrow.

17,472,593.28675844

ten million position

(10,000,000 times unit position)

ten millionths position

(4/10,000,000)

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