Sagot :
(15-9*10^(-3))/(5*10^2)
=15/5*10^(-2)-9/5*10^(-5)
=3*10^(-2)-1,8*10^(-5)
=3/100-18/1000000
=0,029982
=14991/500000
(15 - 9 × 10⁻³) / (5 × 10²) = 15 / (5 × 10²) - (9 × 10⁻³) / (5 × 10²)
= 3 × 10⁻² - 9/5 × 10⁻³⁻²
= 3 × 0,01 - 1,8 × 10⁻⁵
= 0,03 - 0,000018
= 0,029982