Bonsoir !
a) 23,56x10³x10^7 =
a) 2,356×10¹×10³×10^7 = 2,356×10^11
b) 125×10^-4×10^-5 = >
b) 1,25×10²×10^4×10^-5 = 10^²×10¹
c) 0,15×10^8×10^-14 = >
c) 1,5×10-¹×10^8×10^-14 = 1,5×10^-7
d) 0,036×10^4×10^-9 =>
d) 3,6×10-²×10^4×10^-9 = 3,6×10^-7
Bonne soirée.