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Basic 3 · Mathematics

Number Operations

Notes on Number Operations for Basic 3 Mathematics. Open a topic to start.

  1. Adding and Subtracting within 1000In this topic you will add and subtract 3-digit numbers using the column method, including regrouping.
  2. Equal and Not Equal, Missing NumbersIn this topic you will use = and ≠ and find missing numbers in number sentences.
  3. Adding in Your HeadIn this topic you will use quick strategies to add numbers within 100 in your head.
  4. Subtracting in Your HeadIn this topic you will use quick strategies to subtract numbers within 100 in your head.