Раскройте скобки и решите упрощая выражение :
а) -0,37 + ( 4,2 - 4,63 ) =
б) -13,96 - ( -15,87 - 2,51 ) =
в) 3 7/16 - ( 5/12 - 4 9/16 ) =
Решите уравнения:
- (0,2х - 0,7) = 0,84
          и
- 5/9 * 2 1/4 * 1,8 = 6,75
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