50 cm
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One and a half meter is written as 1 1/2 meters or 1.5 meters.
It is the same: one half.
A millimicron is the same as a nanometer (one billionth of one meter).
NO. 1.2 is the same as 1 and two tenths, or 1 and one fifth. 1.5 is the same as one and a half. 1.2 is less than 1.5.
No. Taking one half of a number is the same as dividing it by 2. If you divide a number by 1/2 that's the same as multiplying it by 2.