any trick to solve 123456789×999999999 in 30 seconds
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Answered by
1
by calculator we can do fast
Unis1:
in exams we don't have to make use of calculators
Answered by
0
first add 1 to 999999999
1000000000
then multiply it 123456789
than the answer came
-1 in the answer
1000000000
then multiply it 123456789
than the answer came
-1 in the answer
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