First it depends on were is the zero, but yes its important because it gives an order of mangitude.
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The most important math concept is the idea of zero.
All numbers is important to math because without numbers, there is no math.
0 it is zero zero zero!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 0 it is zero zero zero!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
70.000.000 is Seventy million.
Nine Hundred Million or, Nine Zero Zero Zero Zero Zero Zero Zero Zero, or Nine followed by eight zeroes.