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Multiplication Multiplying with 999 Speed Math

[Speed Math] MULTIPLYING WITH 999

Here’s an example of a SPEED MATH shortcut for MULTIPLYING WITH 999 : (Mul) Nx999 from the MULTIPLICATION category.

Multiplying with 999

When can I use this method?

For multiplying any number with 999.

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pdf Download Practice sheet for MULTIPLYING WITH 999

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Notes –

  1. The separator should be inserted before the hundred’s (100’s) digit.
  2. The complement of a number is what you need to add to it to make it up to some specified total – in this case 1000.

Related Shortcuts –

Multiplying with 9: (Mul) Nx9
Multiplying with 99: (Mul) Nx99


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