When I was young, I always lost my calculator, so I was often force to write my math exams without a calculator. Now I can do pretty much anything in my head, that includes multiplying numbers with decimals together. For example: 234.83 X 283.123
2007-01-19
13:28:42
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6 answers
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asked by
Anonymous
in
Science & Mathematics
➔ Mathematics
this is how i do it using this example. 234.83 X 283.123.. First I round both number (250 X 300) so i know that the number will be close to 25000X 3 which is 75000. then i remove all decimal and calculate 23483 X 283123 in my head. and the answer is 66485.77409. I normally round to 2 decimal point
2007-01-19
13:53:21 ·
update #1