Répondre :
A.
1) 100 000 x 10 000 x 1 000 000 000 / 10 x 1000 = 10^5 x 10^4 x 10^9 / 10^4 = 10^5 x 10^9 = 10^14
2) 10 x 1 000 = 10^4
3) 50 000 000 x 0. 000 002 = 5x10^7 x (2x 10^-6)= 10 x 10^7 x 10^-6 = 10 x 10 = 10^2
4) (30 000 x 300 ) ^2 = (3 x 10^4 x 3 x 10^2) ^2 = 9^2 x 10^12 = 81 x 10^2 = 9^2 x 10^2
5) 0,000 003^4 = ( 3 x 10^-6)^4= 3^4 x 10^-24 = 81 x 10^-24 = 9^2 x 10^-24
B.
1) 5 000 = 5 x 10^3
2) 24 x 5000 = 24 x 5 x 10^3 = 120 x 10^3 = 12 x 10^4
3) 12 x 10^4 x 365 x 80 = 12 x 8 x 365 x 10^5 = 35 040 x 10^5 = 3 504 x 10^6 = 219 x 2^4 x 10^6
1) 100 000 x 10 000 x 1 000 000 000 / 10 x 1000 = 10^5 x 10^4 x 10^9 / 10^4 = 10^5 x 10^9 = 10^14
2) 10 x 1 000 = 10^4
3) 50 000 000 x 0. 000 002 = 5x10^7 x (2x 10^-6)= 10 x 10^7 x 10^-6 = 10 x 10 = 10^2
4) (30 000 x 300 ) ^2 = (3 x 10^4 x 3 x 10^2) ^2 = 9^2 x 10^12 = 81 x 10^2 = 9^2 x 10^2
5) 0,000 003^4 = ( 3 x 10^-6)^4= 3^4 x 10^-24 = 81 x 10^-24 = 9^2 x 10^-24
B.
1) 5 000 = 5 x 10^3
2) 24 x 5000 = 24 x 5 x 10^3 = 120 x 10^3 = 12 x 10^4
3) 12 x 10^4 x 365 x 80 = 12 x 8 x 365 x 10^5 = 35 040 x 10^5 = 3 504 x 10^6 = 219 x 2^4 x 10^6