Aidez moi svp le 102, 103, 105

Réponse:

102.

76/24 = 2×38 / 2+12 = 4×19 / 4×2×3 = 19 / 6

225 / 135 = 5 × 45 / 5 ×27 = 5×5×9 / 5 × 3 × 9 = 5/ 3

103.

180 / 108 = 9×4×5 / 9×3×5 = 4/3

13650/1785 = 5×3×7×130 / 5×3×7×17 = 130/17

143/52

420/2520= 2×10×3×7 / 2×10×3×7×6 = 1/6

105.

(1/2+1/4+1/8)×4= (4+2+1 / 8 ) ×4 = 7/8 × 4 = 28/8 = 7/2

4/18 - 1/2 + 91/36 = 8 -18 +91 / 36 = 81/36= 9/4