volume_mute

Multiply a Four-Digit Number by a One-Digit Number

publish date: 2026/05/09 07:02:13.874776 UTC

volume_mute

Multiply: \(9 \times 2{,}345\)

Correct Answer

21,105

Explanation

  1. \(5 \times 9 = 45\). Write 5, carry 4.
  2. \(4 \times 9 = 36\). Add 4: \(40\). Write 0, carry 4.
  3. \(3 \times 9 = 27\). Add 4: \(31\). Write 1, carry 3.
  4. \(2 \times 9 = 18\). Add 3: \(21\). Write 21.

Product: 21,105.

Reference

go-math-science.com

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