а) -148 + (-273) = -421;б) -36 + (-54) = -90;в) -48 + 67 = 19;г) -22.6 + (-5.4) = -28;д) 84 + (-69) = 15;е) 4.75 + (-2.83) = 1.92;ж) -3 7/9 + (-2 5/9) = -6 2/3;з) -1 8/15 + 1 9/20 = 1/20;и) -0.37 + (-0.84) = -1.21;к) 5/18 + (-7/24) = -1/8;л) -3 4/13 + (-1 4/63) = -4 40/273;м) -6.5 + 8.23 = 1.73.
а) -148 + (-273) = -421;
б) -36 + (-54) = -90;
в) -48 + 67 = 19;
г) -22.6 + (-5.4) = -28;
д) 84 + (-69) = 15;
е) 4.75 + (-2.83) = 1.92;
ж) -3 7/9 + (-2 5/9) = -6 2/3;
з) -1 8/15 + 1 9/20 = 1/20;
и) -0.37 + (-0.84) = -1.21;
к) 5/18 + (-7/24) = -1/8;
л) -3 4/13 + (-1 4/63) = -4 40/273;
м) -6.5 + 8.23 = 1.73.