Digits - symbols used to show numbers 0,1,2,3,4,5,6,7,8,9
Place Value - value of the digit
Period - each three digits starting from the right for a period, which are separated by commas
Standard Form: (Example - 1.506)
Expanded Form: (Example - 1 + 0.5 + 0.01 + 0.006)
Word Form: One and five hundred sixteen thousandths
Tenths: 0.5
Hundredths: 0.51
Thousandths: 0.516
Equivalent Decimals: Name the same amount
Commutative Property of Addition: You can add two numbers in any order.
Associative Property of Addition: You can change the grouping of addends.
Identity Property of Addition: You can add zero to any number and the sum will be the number.
Compatible Numbers: Numbers that are easy to add mentally. Using compatible numbers and the commutative and Associative Properties, it is often easy to add mentally
Compensation: You adjust one number to make computation easier and compensate by changing the other
Rounding: For estimation - adjust digit to round to the nearest desired value
Front-end Estimation - First add the front end numbers, then adjust to include the remaining numbers.
Place Value - value of the digit
Period - each three digits starting from the right for a period, which are separated by commas
Standard Form: (Example - 1.506)
Expanded Form: (Example - 1 + 0.5 + 0.01 + 0.006)
Word Form: One and five hundred sixteen thousandths
Tenths: 0.5
Hundredths: 0.51
Thousandths: 0.516
Equivalent Decimals: Name the same amount
Commutative Property of Addition: You can add two numbers in any order.
Associative Property of Addition: You can change the grouping of addends.
Identity Property of Addition: You can add zero to any number and the sum will be the number.
Compatible Numbers: Numbers that are easy to add mentally. Using compatible numbers and the commutative and Associative Properties, it is often easy to add mentally
Compensation: You adjust one number to make computation easier and compensate by changing the other
Rounding: For estimation - adjust digit to round to the nearest desired value
Front-end Estimation - First add the front end numbers, then adjust to include the remaining numbers.