Use two unit multipliers to convert 1000 mm² to square centimeters.
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First, write down known facts:> 1cm2 = 100mm2
Second, using these facts create a pair of unit multipliers:> 1cm2 / 100mm2 or 100mm2 / 1cm2
Third, go ahead with the unit conversion:>
1000mm2 / 1 x 1cm2 /100mm2 = 1000cm2 / 100 = 10cm2
As you can see, 1000mm2 has been turned into a fraction by dividing it by 1; then that fraction is multiplied by adequate unit multiplier, the one that has mm2 in its denominator.
I hope this can help...