25x(40+4) = 25x40 + 25x4 = 1000 + 100 = 1100
47x28+47x23 = 47x(28+23) = 47x51 = 2397
36x(19+28) = 36x47 = 1692
58x(39+54+17) = 58x100 = 5800
76x(100-25-36) = 76x39 = 2964
159+66x9-23x27 = 159 + 66x9 - 699 = 708
(32+68)-17x24+46 = 100 - 408 + 46 = -262
(72+48)-21x17+46 = 120 - 357 + 46 = -191
(56+89)-54x15+27 = 145 - 810 + 27 = -648
(36+74)-35x30+48 = 110 - 1050 + 48 = -952
104Ⅹ25=(100+4)ⅹ25=100ⅹ25+4x25=2500十100=2600
