Newly Introduced Vocabulary – Place Value
A way of writing a number to show the value of each digit. This is shown as a sum of each digit multiplied by its matching place value.
4,356 in expanded form is:
The place of a number that is five digits to the left of the decimal.
The place of a number that is six digits to the left of the decimal.
Alter a number to be less exact but more convenient for calculations.
123 rounds down to 100
156 rounds up to 200
The base ten rule means that any number with the digit 5 is halfway to the next base 10 number. This rule is also how students determine if a number rounds up or down.
5 is halfway to 10
500 is halfway to 1,000