Standards with the same topic and subject but for other grades
Add within 100, using concrete models or drawings and strategies based on place value:
Explain why addition and subtraction strategies work, using place value and the properties of addition.
Add and subtract within 100 using strategies based on place value, properties of addition, and/or the relationship between addition and subtraction.
Subtract 10 or 100 from a given number 100-900.
Add 10 or 100 to a given number 100-900, and
Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of addition, and/or the relationship between addition and subtraction.
Understand that sometimes it is necessary to compose or decompose tens or hundreds.
Relate the strategy to a written method and explain the reasoning used.
Understand that in adding or subtracting three-digit numbers, add or subtract hundreds and hundreds, tens and tens, ones and ones.