[Speed Math] MULTIPLYING WITH 9

Here’s an example of a SPEED MATH shortcut for MULTIPLYING WITH 9 : (Mul) Nx9 from the MULTIPLICATION category.

When can I use this method?

For multiplying any number with 9.

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Download Practice sheet for MULTIPLYING WITH 9

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Notes –

1. The separator should be inserted before the unit’s (one’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 10.

Related Shortcuts –

Multiplying with 99: (Mul) Nx99
Multiplying with 999: (Mul) Nx999

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