bonjour
A = ( 4 + 5/8 ) x 2 /3
A = ( 32/8 + 5/8 ) x 2/3
A = 37/8 x 2/3
A = 74/24 = 37/12
B = 8/45 - 8/ 9
B = 8/45 - 40/45 = - 32/45
487.9 x 10 ⁻⁵ = 4.879 x 10² x 10 ⁻⁵ = 4.879 x 10 ⁻³
0.000 54 x 10 ⁹ = 5.4 x 10 ⁻⁴ x 10 ⁹ = 5.4 x 10 ⁵
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bonjour
A = ( 4 + 5/8 ) x 2 /3
A = ( 32/8 + 5/8 ) x 2/3
A = 37/8 x 2/3
A = 74/24 = 37/12
B = 8/45 - 8/ 9
B = 8/45 - 40/45 = - 32/45
487.9 x 10 ⁻⁵ = 4.879 x 10² x 10 ⁻⁵ = 4.879 x 10 ⁻³
0.000 54 x 10 ⁹ = 5.4 x 10 ⁻⁴ x 10 ⁹ = 5.4 x 10 ⁵