а) 24*98+24*2 = 24•(98 + 2) = 24•100 = 2400;
в) 49*18+18 = 18•(49 + 1) = 18•50 = 900;
б) 305*199+305*1 = 305•(199 + 1) = 305•200 = 61000;
г) 153*598+360 = 153*598 + (153•2 + 54) = (153*598 + 153•2) + 54 = 153•(598 + 2) + 54 = 153•600 + 54 = 91800 + 54 = 91854.
а) 24*98+24*2 = 24•(98 + 2) = 24•100 = 2400;
в) 49*18+18 = 18•(49 + 1) = 18•50 = 900;
б) 305*199+305*1 = 305•(199 + 1) = 305•200 = 61000;
г) 153*598+360 = 153*598 + (153•2 + 54) = (153*598 + 153•2) + 54 = 153•(598 + 2) + 54 = 153•600 + 54 = 91800 + 54 = 91854.