Răspuns :
69 - 24 ÷ 3 × (72 ÷ 9 - 2 × 3) ÷ 8 × 9 =
= 69 - 8 × (8 - 6) ÷ 8 × 9
= 69 - 8 × 2 ÷ 8 × 9
= 69 - 16 ÷ 8 × 9
= 69 - 2 × 9
= 69 - 18
= 51
69 - 24 ÷ 3 × (72 ÷ 9 - 2 × 3) ÷ 8 × 9 =
= 69 - 8 × (8 - 6) ÷ 8 × 9
= 69 - 8 × 2 ÷ 8 × 9
= 69 - 16 ÷ 8 × 9
= 69 - 2 × 9
= 69 - 18
= 51