North Carolina Department of Public Instruction 58 min(s)

Decompose a three-digit number into expanded form. Compose a three-digit number given the number of hundreds, tens, and ones. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds. Students should understand that value of the digits in a number.