1) 290.45+0.4511 = 13.05 + 4.95 = 18
2) 4.07-5.49+8.93-1.51 = 16.5 - 7 = 9.5
3) -11.401-23.17+4.401-10.83 = -45
4) (51.8+44.3+48.2-24.3)1/3 = (120.6)1/3 = 40.2
1) 290.45+0.4511 = 13.05 + 4.95 = 18
2) 4.07-5.49+8.93-1.51 = 16.5 - 7 = 9.5
3) -11.401-23.17+4.401-10.83 = -45
4) (51.8+44.3+48.2-24.3)1/3 = (120.6)1/3 = 40.2