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Chapter 2

Basic Operations

Adding, subtracting, multiplying and dividing larger numbers — working from the ones place, carrying over, and estimating to check — with an interactive exercise.

We add, subtract, multiply and divide larger numbers.

For example, 1250 + 340 = 1590, and 8 × 9 = 72. Always work from the ones place and carry over when needed.

Remember

  • Start adding from the ones and carry to the next place.
  • Check your answer by estimating first.

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