80-16:2. 5*3+34. 400:4+230. 710-500:100. 27: (3*3). 45+6*4. 20:5+100*0. 10*5+16. 81+8*100

80-16:2 = 80 - 8 = 72

5*3+34 = 15+34=49

400:4+230 = 100+230 = 330

710-500:100 = 710-5 = 705

27: (3*3) = 27:6 = 4,5

45+6*4 = 45+24 = 69

20:5+100*0 = 4+0 = 4

10*5+16 = 50+16 = 66

81+8*100 = 81+800 = 881