Réponse:
A= 8/15 - 7/15 : (7/5 + 5/6)
= 8/15 - 7/15 : 42+25/30
= 8/15 - 7/15 : 67/30
= 8/15 - 7/15 × 30/67
= 8/15 - 7×2/67
= 8/15 - 14/67
= 536-210/1005
= 326/1005
B= 6×10‐⁴ ×25×10² / 15×10‐⁵
= 150×10‐² /15×10‐⁵
= 150/15 × 10‐²/10‐⁵
= 10 × 10³
=10⁴
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Réponse:
A= 8/15 - 7/15 : (7/5 + 5/6)
= 8/15 - 7/15 : 42+25/30
= 8/15 - 7/15 : 67/30
= 8/15 - 7/15 × 30/67
= 8/15 - 7×2/67
= 8/15 - 14/67
= 536-210/1005
= 326/1005
B= 6×10‐⁴ ×25×10² / 15×10‐⁵
= 150×10‐² /15×10‐⁵
= 150/15 × 10‐²/10‐⁵
= 10 × 10³
=10⁴