Решение:
$$875 - 496 = 379$$
$$563 + 289 = 852$$
$$602 + 398 = 1000$$
$$840 : 4 = 210$$
$$960 : 3 = 320$$
$$720 : 4 = 180$$
$$276 * 2 = 552$$
$$148 * 3 = 444$$
$$320 * 3 = 960$$
$$48 : 6 * 70 = 8 * 70 = 560$$
$$32 : 4 * 90 = 8 * 90 = 720$$
$$28 : 7 * 60 = 4 * 60 = 240$$
Ответ: 379; 852; 1000; 210; 320; 180; 552; 444; 960; 560; 720; 240