Sagot :
A.
12.10⁴ = 1,2.10^5
97.10-⁵= 9,7.10^-4
17.10³= 1,7.10^4
12,5.10-⁷= 1,25.10^-6
43,9.10²= 4,39.10^3
B.
5.10⁵ x 3.10-²= 5*3.10^(5-2) = 15.10^3
48.10² x 0,5.10⁶= 48*0,5.10^(2+6) = 24.10^8 = 2,4.10^9
4,8.10⁵ x 3,15.10-²=4,8*3,15.10^(5-2) = 15,12.10^3 = 1,512.10^4
48,3.10² x 0,48.10⁶=48,3*0,48.10^(2+6) = 23,184.10^8 = 2,3184.10^9
12.10⁷/4.10⁵=3.10^(7-5) = 3.10²
(2.10²)³= 2^3.10^(2*3) = 8.10^6
11,9.10⁷/3,96.10⁵= 119/396 . 10^(6-3) = 119/396 . 10^3
35,7.10-²/3,25.10-⁵=357/325 . 10^(-1+7) = 357/325 . 10^6
(2,05.10²)³= (2,05)^3.10^6 = 8,615125.10^6
4,32.10⁶/2,5.10² x 75.10³= 129,6.10^(6-2+3) = 1,296.10^9
En espérant t'avoir aidé.
A.
12*10⁴ = 1,2*10^5 97*10-⁵= 9,7*10^-4 17*10³= 1,7*10^4
12,5*10-⁷= 1,25*10^-6 43,9*10²= 4,39*10^3
B.
5*10⁵ * 3*10-²= 5*3*10^(5-2) = 15*10^3
48*10² * 0,5*10⁶= 48*0,5*10^(2+6) = 24*10^8 = 2,4*10^9
4,8*10⁵ * 3,15*10-²=4,8*3,15*10^(5-2) = 15,12*10^3 = 1,512*10^4
48,3*10² * 0,48*10⁶=48,3*0,48*10^(2+6) = 23,184*10^8 = 2,3184*10^9
12*10⁷/4*10⁵=3*10^(7-5) = 3*10² (2*10²)³= 2^3*10^(2*3) = 8*10^6
11,9*10⁷/3,96*10⁵= 119/396 * 10^(6-3) = 119/396 * 10^3
35,7*10-²/3,25*10-⁵=357/325 * 10^(-1+7) = 357/325 * 10^6
(2,05*10²)³= (2,05)^3*10^6 = 8,615125*10^6
4,32*10⁶/2,5*10² x 75*10³= 129,6*10^(6-2+3) = 1,296*10^9
bonne chance