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Thank you very much!
This makes me just want to use a calculator. It seems it will take many people some time just figuring out those halves and doubles for certain numbers.
can you give us reference please
Multiplication tricks
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Thank you very much!
This makes me just want to use a calculator. It seems it will take many people some time just figuring out those halves and doubles for certain numbers.
can you give us reference please
Multiplication tricks