Répondre :
bonsoir
A = 2 x 10 ² + 10 ¹ + 10 ⁻¹ + 2 x 10 ⁻²
= 200 + 10 + 0.1 + 0.02
= 210.12
b ) 210.12 = 2.1012 x 10 ²
c) 210 .12 = 21012 x 10 ²
d) 210.12 = 210 + 12 /100
bonsoir
A = 2 x 10 ² + 10 ¹ + 10 ⁻¹ + 2 x 10 ⁻²
= 200 + 10 + 0.1 + 0.02
= 210.12
b ) 210.12 = 2.1012 x 10 ²
c) 210 .12 = 21012 x 10 ²
d) 210.12 = 210 + 12 /100