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Standards/Math/District of Columbia/3.NBT.A

3.NBT.A

3.NBT Number and Operations in Base Ten
3.NBT.A
3.NBT.A.13.NBT.A.23.NBT.A.3

Use place value understanding and properties of operations to perform multi-digit arithmetic.

3.NBT.A.1Use place value understanding to round whole numbers to the nearest 10 or 100.3.NBT.A.2Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.3.NBT.A.3Multiply one-digit whole numbers by multiples of 10 in the range 10–90 (e.g., 9 × 80, 5 × 60) using strategies based on place value and properties of operations.
Khan Academy Resources
Subtracting 3-digit numbers (no regrouping)Adding and subtracting on number lineSubtracting 1s, 10s, and 100sSubtracting 1, 10, or 100
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