Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. 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.
Khan Academy ResourcesSubtract within 1,000 using place value blocksSubtract on a number lineSubtract 10s and 100s (no regrouping)Estimate to add multi-digit whole numbersAdd on a number lineAdd within 1,000 using place value blocksAdd using groups of 10 and 100Break apart 3-digit addition problemsSelect strategies for adding within 1000Add 10s and 100s (no regrouping)Breaking apart 3-digit addition problemsSubtracting 3-digit numbers (no regrouping)Adding 10 or 100Adding 1s, 10s, and 100sAdding and subtracting on number lineAddition using groups of 10 and 100Subtracting 1s, 10s, and 100sAdding 3-digit numbers (no regrouping)Subtracting 1, 10, or 100Subtracting with place value blocks (regrouping)
1-on-1 AI tutoring aligned to 2.NBT.B.7. Instant help for students, real-time insights for teachers.
Used in classrooms by 100,000+ students at Baltimore County, Plano ISD, Deer Valley USD, KIPP, and districts nationwide.
Free for teachers, forever →