bonjour

a. 150 x 8 x 10 ⁸ = 1 200 x 10 ⁸ = 1.2 x 10 ¹¹

b. 2 x5  x 10 ⁻⁷ = 10 x 10 ⁻ ⁷ = 10 ⁻⁶

c.  12 x 10 ³ = 1.2 x 10 ⁴

d. 14 x 10 ³ = 1.4 x 10 ⁴

e. 3.6 x 10 ⁻³

f . 1.5 x 10 ⁻⁴