1) 5 * 8 + 15 * 2 + 8 + 2 * 8 = 40 + 30 + 8 + 24 = 78 + 24= 102
2) 5*20+15*20+20+2*20=100+300+60=460
<span>Log6 12-log6 3+ log6 9=log6 (12*9/3)=log6(36)=2</span>
1) 1000-(500+120)=380
2) 580-(160-120)=540
3) 950-(600-300)=650
4) (350+80)-100=330
5) (720-70)-150=500