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Am nevoie in cateva min de acest ex va rog dau coroana ex e urmatorul : (5/16-5/24)÷ 15/72+2 1/3 ÷5 1/4

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
Am scris rezolvarea pe foaie:
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