bonsoir
A = 25² x 1.45 x 4 ² = ( 25 * 4 )² * 1.45 = 10 000 * 1.45 = 14 500
b = 0.4 ³ x 2.5 ³ x 1 999 = ( 0.4 * 2.5 ) ³ * 1 999 = 1 * 1 999 = 1 999
C = 2 ⁷ x 11 x 5 ⁷ = 10 ⁷ x 11 = 110 000 000
D = 5 ⁴ x 2 ⁶ = 625 * 64 = 40 000
continue en regroupant les mêmes puissances
