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Sagot :

VINS

bonjour

tu as les règles de calcul sous les yeux

4 x 10 ⁻⁴ x 10 ³ = 4 x 10 ⁻¹

2.5 x 10 ⁻⁸

0.51 x 10 ⁻¹² = 5.1 x 10 ⁻¹³

10 ² + 10 ⁻¹ = 100 + 0.1 = 100. 1 = 1.001 x 10 ²

20 x 10 ⁻⁵ : 4 x 10 ⁹  = 5 x 10 ⁻¹⁴

2 x 10 ² +  9 x 10 ⁰ + 7 x 10 ⁻¹

=  200 + 9 + 0.7

= 209. 7   = 2.097 x 10 ²

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