Calculer : 3,12.10^5*1,25.10^9= 2,45.10-^6:3,89.10-^8= 0,000456*3,16.10^4= 4,85.10^8+1,03.10^9=

Calculer 312105125109 245106389108 0000456316104 485108103109 class=