A = 0.00689
A = 6.89 * 10⁻³
B = 245 000 000 000
B = 2.45 * 10¹¹
C = 14 * 10⁸ * 18 * 10⁻³ / 10²
C = 14 * 18 * 10⁸ * 10⁻³ / 1000
C = 252 * 10⁵ / 1000
C = 25 200 000 / 1000
C = 25 200
C = 2.52 * 10⁴
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( 5 - ( 1/5 ) ) * 5
= ( 5 - 0.2 ) * 5
= 4.8 * 5
= 24
J'espère t'avoir aidé ! :)
