Bonjour, aidez moi pour un dm en maths svp. 1) Calculer et donner le résultat sous la forme la plus simple. a) 2/3 × 3/7× 7/11 b) 10/6 × 14/5 × 3/7 c) 8/15 × 35

a) 2/3 × 3/7 × 7/11 
= 2×3/3×7 × 7/11
= 6//21 × 7/11
= 6×7/21×11
= 42/231
= 42÷21/231÷21
= 2/11

b) 10/6 × 14/5 × 3/7
= 10×14/6×5 × 3/7
= 140/30 × 3/7
= 140×3/30×7
= 420/210
= 420÷210/210÷210
= 2/1
= 2

c) 8/15 × 35/12 × 9/21
= 8×35/15×12 × 9/21
= 280/180 × 9/21
= 280×9/180×21
= 2 520/3 780
= 2 520÷60/780÷60
= 42/13

d) 27/63 × 13 ×54/26
= 27/63 × 13/1 × 54/26
= 27×13/63×1 × 54/26
= 351/63 × 54/26
= 351×54/63×26
= 18 954/1 638
= 18 954÷234/1 638÷234
= 81/7

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Suis-je