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Grade 2 · NBT
Explain Why the Addition Algorithm Works
Explain why the written addition algorithm lines up digits by place value.
Grade 2Common Core 2.NBT.B.9NBTVerified correct ✓
Worked examples
When you add 49 + 72 using the standard written method (stacking), why do you write hundreds under hundreds, tens under tens, and ones under ones? Explain the reason. Answer:
When you add 43 + 74 using the standard written method (stacking), why do you write hundreds under hundreds, tens under tens, and ones under ones? Explain the reason. Answer:
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