Verified answer

Réponse:

• 1. 1/6 + 11/12 = 1×2/6×2 + 11/12 = 2/12+11/12 = 13/12
• 2. 11/20 - 2/5 = 11/5 - 2×4/5×4= 11/20 - 8/20 = 3/20
• 3. 7/18 +4/9 = 7/18 +4×2/9×2 = 7/18 +8/18 =15/18
• 4. 5/6 - 1/30 = 5×5/6×5 - 1/30 = 25/30 - 1/30 = 24/30
• 5. 2+5/6 = 2/1 +5/6 = 2×6/1×6 +5/6 = 12/6 + 5/6 =17/6
• 6. 5- 14/3 =5/1 - 14/3= 5×3/1×3 - 14/3= 15/3-14/3 = 1/3
• 7. 1/2+1/4+1/8 = 1×4/2×4 + 1×2/4×2+1/8 = 4/8 + 2/8 +1/8 = 7/8
• 8. 1-5/9+5/3= 1/1 - 5/9 +5×3/3×3 = 1×9/1×9 - 5/9 + 15/9= 9/9 - 5/9 + 15/9= 19/9