calculator help

Ron used a calculator to determine that 0.35*2.4=0.84. Ron wants to know why the rule about adding up the number of places to the right of the decimal point doesnt work in this case. Why aren't there 2+1=3 digits to the right of the decimal point in the answer? Is Ron correct that the rule about adding the number of places to the right of the decimal points is not correct in this case?
Explain.

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Originally Posted by recca

Ron used a calculator to determine that 0.35*2.4=0.84. Ron wants to know why the rule about adding up the number of places to the right of the decimal point doesnt work in this case. Why aren't there 2+1=3 digits to the right of the decimal point in the answer? Is Ron correct that the rule about adding the number of places to the right of the decimal points is not correct in this case?
Explain.

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Calculators don't display leading zeroes before the decimal point or trailing zeroes after the decimal point unless you program them to. Only significant figures.