Răspuns :
(5/16 - 5/24) : 15/72 + 2 1/3 : 5 1/4 =
= (5/16 - 5/24) : 15/72 + 7/3 : 21/4 =
= (3×5/48 - 5×2/48) : 15/72 + 7/3 × 4/21 =
= (15/48-10/48) ×72/15 + 4/9 =
= 5/48 × 72/15 + 4/9 =
= 36/24×3 + 4/9 =
= 36/72 + 4/9 =
= 36/72 + (4×8)/72 =
= (36 + 32)/72 =
= 68/72 =
= 17/18
= (5/16 - 5/24) : 15/72 + 7/3 : 21/4 =
= (3×5/48 - 5×2/48) : 15/72 + 7/3 × 4/21 =
= (15/48-10/48) ×72/15 + 4/9 =
= 5/48 × 72/15 + 4/9 =
= 36/24×3 + 4/9 =
= 36/72 + 4/9 =
= 36/72 + (4×8)/72 =
= (36 + 32)/72 =
= 68/72 =
= 17/18