(7,86+4,183)-2,86 и 0,614-(0,314+0,207)
(7,86+4,183)-2,86=9,183 0,614-(0,314+0,207)=0,507
1)7.86+4.183-2.86=12.043-2.86=9.183 2)0.614-0.521=0.093