а) 1260 - 120 = 1140; 1140 : 2 = 570;
б) 5003 - 7 = 4996; 300 - 300 = 0; 4996 * 0 = 0;
в) 500 - 100 = 400; 400 + 200 = 600; 301 - 300 = 1; 600 : 1 = 600;
г) 20 * 10 = 200; 200 : 2 = 100.
а) 1260 - 120 = 1140; 1140 : 2 = 570;
б) 5003 - 7 = 4996; 300 - 300 = 0; 4996 * 0 = 0;
в) 500 - 100 = 400; 400 + 200 = 600; 301 - 300 = 1; 600 : 1 = 600;
г) 20 * 10 = 200; 200 : 2 = 100.