Răspuns:
Explicație pas cu pas:
0,6 = 6/10 = 3/5
prima paranteza
5/8 - 3/5 = 25/40 - 24/40 = 1/40
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0,4 = 4/10 = 2/5
a doua paranteza
2/5 + 3/5 = 5/5 = 1
_____________________
1/40 : 1/18 + 1*8/9 = 1/40*18/1 + 8/9 = 9/20 + 8/9 = 81/180 + 160/180 = 241/180
