В) 3,96+(4,81-5)-(0,81-0,04)=3.96+4.81-5-0.81+0.04=3
3.96+0.04=4
4.81-0.81=4
4+4-5=3
Г)-2,7-(8,5-3,9)+(2,7-0,9)=-2.7-8.5+3.9+2.7-0.9=-5.5
2.7-2.7=0
3.9-0.9=3
3-8.5=-5.5
Д)-14,6+(12-5,4)-(8-12)=-14,6+12-5.4-8+12=12
8+12=20
-14.6-5.-20
20-20=0
0+12=12
Е)23,08-(8,32+23,08)+0,12=23.08-8.32-23.08+0.12=8.2
23.08-23.08=0
0.12-8.32=-8.2
0-8.2=8.2