Раскройте скобки и вычислите:
а) – (98 + 49) – (102 – 49)=
б) (149 + 237) – (137 + 49)=
в) (123 – 254) – (23 – 354)=
г) – (95 + 105) – (398 – 98)=

а) -(45+17-22)=
б) -(28+14-19)=
в) -(-49-3-17)=
г) -(12-9+45)=
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