1) |-7,2| - |3,4| = 7,2 - 3,4 = 3,8
2) |-12| * |-8| = 12 * 8 = 96
3) |-5/12| + |3/16| = 5/12 + 3/16 = (5*4)/(12*4) + (3*3)/(16*3) = 20/48 + 9/48 = 29/48
4) |-56| : |-0,7| = 56 : 0,7 = 560 / 7 = 80
Ответ: 1) 3,8; 2) 96; 3) 29/48; 4) 80.