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multiply by 9 the last digit goes 9,8,7,6, ... your hands can help! Example: to multiply 9 by 8, hold your 8th finger down, and count "7" and "2", the answer is 72

multiply by 9


the last digit goes 9,8,7,6, ...

your hands can help! Example: to multiply 9 by 8,
hold your 8th finger down, and count "7" and "2",
the answer is 72

Grade:

1 Answers

Sourabh Singh IIT Patna
askIITians Faculty 2104 Points
8 years ago

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