Let's see, there are 100 cm in a meter ("centi" means "hundredth" just as " milli" means "thousandth"), so half a meter would be half of a hundred cm, which makes 50 just about spot on....
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The first step in answering this question is to convert the metres value into cm. That makes the sum easier, and allows us to work with consistent units. There are 100cm in a m, so to convert from m to cm you have to multiply by 100. In this case, we have 0.5m, so multiply that by 100 to give 50cm. Therefore the question can be rewritten as how many cm is 50cm longer than 34cm. The answer is just 50-34 or 16cm.
There are 50 centimeters in half a meter.1 metre = 100 centimetres so 0.5 metres = 0.5*100 = 50 centimetres.
.5 meters = 50 centimeters
There are 100 centimetres in a metre, therefore, 50 cm is half or 50 %.
a metre=100 cm half a metre=(.5)*(100)=50 cm total length=previous length+half a length = 78 cm +50 cm =128 cm or 1.28 metre