79 - 19 * 2 + 34 = 79 - 38 + 34 = 41 + 34 = 75
98 - 20 - 6 * 12 = 98 - 20 - 72 = 78 - 72 = 6
78 : ( 64 - 58 ) = 78 : 6 = 13
9 * ( 42 - 37 ) = 9 * 5 = 45
1)3,6 × (-4, 7)= -16,92
2)- 4 4/9 × (-1 1/8)= 5
3) - 29,52:0,4= -73.8
4)-70,98 : (-14)= 5.07