2.NBT.B.7 — Add and subtract within 1000 using concrete models or drawings and strategies based on place value.
Cluster: Use place value and properties to add and subtract
What this standard asks students to do
2.NBT.B.7 is a 2nd grade Common Core standard in the Number & Operations in Base Ten strand. It asks students to: add and subtract within 1000 using concrete models or drawings and strategies based on place value. Teachers typically address it during the use place value and properties to add and subtract cluster, alongside the related standards listed below. FoxFish generates printable worksheets, auto-graded quizzes, and flashcard sets aligned to this standard in seconds.
Sample questions aligned to 2.NBT.B.7
- Example 1
345 + 278 = ?
- Example 2
612 − 159 = ?
- Example 3
Draw base-ten blocks to find 426 + 235.
Want a full worksheet? Generate 20 problems aligned to 2.NBT.B.7.
Common student mistakes
Build distractors and reteach prompts around the errors students actually make on this standard.
- 1Rushing to an answer without showing the work with pictures or manipulatives — 2nd-grade students who skip this stage often can't debug their own errors.
- 2Mis-identifying what the prompt is actually asking. On 2.NBT.B.7, teachers see students latch onto surface keywords and pick the wrong operation.
- 3Applying a memorized procedure to a case where it doesn't fit — the classic number & operations in base ten trap when problems change form (e.g., 345 + 278 = ?).
Teacher FAQ
What does 2.NBT.B.7 actually ask 2nd-grade students to do?
Students are expected to add and subtract within 1000 using concrete. In the use place value and properties to add and subtract cluster this shows up when they solve problems and explain their reasoning. Full standard text: "Add and subtract within 1000 using concrete models or drawings and strategies based on place value."
How long should we spend on 2.NBT.B.7 in a typical unit?
Most K–2 teachers weave this standard through daily warm-ups for 2–3 weeks, then keep it in spiral review. FoxFish's generator lets you spin up fresh practice each day to keep the reps varied.
What does mastery of 2.NBT.B.7 look like on a quick check?
A student who's mastered 2.NBT.B.7 can add and subtract within 1000 using concrete on unfamiliar prompts, not just the exact examples they practiced. Try one item like: "Draw base-ten blocks to find 426 + 235." — if they explain their reasoning without prompting, they're solid.
Related standards in this cluster
Teacher guides for 2.NBT.B.7
Keep exploring
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