A) 137+(715-328)=137+328=852
б) (515+327)-125=842-125=717
23х=111+27
23х=138
Х=138:23
Х=6
Ответ: 6
(2/3 + 7/12) = (8/12 + 7/12) = 15/12
16/25 * 15/12 = 4/5 * 3/3 = 4/5
9/10:15/16 = 9/10 * 16/15 = 144/150 = 72/75
4/5 - 72/75 = 60/75 - 72/75 = -12/75
-12/75 = -4/25 = -0.16
1) 49/4=12 (ост.1)
2) 140/5=25 (ост.15)