With this Math, trick learns to multiply by 9 easily.
Here is how this Math trick works
With one digit subtract one for the first digit and then for the second number subtract this number from 9
For two digit numbers, you add then subtract.
Add one to the number for the first digit.
Next, subtract one from the last digit and subtract this from nine for the last digit of the number
Multiply by 9 resources
Math made easy playlist
Speed Maths-Multiplying without multiplying- Number 9https://www.youtube.com/watch?v=jH1ZYd-RPKY
Tagged under: multiply 9 shortcut,multiplication,math,mathematics,trick,fast mental multiplication tricks,moomoomath science
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