Вправи 201 - 300 » 287-288

287. 8 • 7 + 8 • 2 = 56 + 16 = 72; 8 • 9 – 8 • 6 = 72 – 48 = 24; 8 • 3 + 8 • 8 = 24 + 64 = 88. 288. 8 • 2 = 16; 8 • 3 = 24; 8 • 4 = 32; 8 • 5 = 40; 8 • 6 = 48; 8 • 7 = 56; 8 • 8 = 64; 8 • 9 = 72.