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shaun Posted on Nov 26, 2011

I am trying 0.037 Amps to milliamperes by useing the x10x button i am preety sure i should press 0.037x10-3 but the answer comes up 37/1000000 when the answer should be 37 not sure if the calculators set up wrong or am pressing the wrong button can some 1 please enlighten me its a casio fx-85gt calculator

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  • Posted on Dec 07, 2011
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Prefixes such as milli already reflect the corresponding multiplier or divisor. One milliamp is 1/1000th of an Amp, so 37 milliamps = 0.037 of an Amp.

To keep two sides of an equation the same, you need to perform the same operation on each side. In this case, the equation is 37/1000 = 0.037. The "divide by 1000" part of this equation is included in the word "milliamp", hence 37 milliamps = 0.037 Amps.

Another way of looking at it is that a number remains unchanged if you both divide and multiply it by the same number. In this case, changing to milliamps is dividing by 1000, so you need to multiply by 1000 to keep the result unchanged.

You have actually divided by 1000 twice as a result of using x10^-3 as a multiplier when you should have used x10^3

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