1.
1) -76•(7•6-60)= -76•(-18)= 1362
2) (-6)•19= -114
3) 1362/-114=11,9
2.
1) 3.5•(-2)-2.8= -7-2.8= -9.8
2) 3.5•2.8= 9.8
3) -9.8/9.8= -1
3.
1) (20-12•5)•(-63)= (20-60)•(-63)= -40•(-63)= 2520
2) 20•(-9)= -180
3) 2520/ -180= -14
4.
1) (6.5-4•15)•(-9)= (6.5-60)(-9)= -53.5•(-9)= 481.5
2) -3•1.5= -4.5
3) 481.5/ -4.5= -107