Efectuați:
a) 5,12+6,8=11,93
1,23+14,1=15,33
23,17-10,83=12,34
b) 10,3+10-20=20,3-20=0,3
21,17+13,31+10=34,48+10=44,48
200-17,35=182,65
c) 2,3•3=6,9
12,7•4=50,8
13,81•10=138,1
d) 28:10=2,8
123,4:10=12,34
124,7:100=1,247
e) 12•(7,1+5,9)=
=12•12,7
=152,4
1,13•4=4,52
2,17•2,3=4,991
f) (3,27+0,73)•0,31=
=4•0,31
=1,24
(10,025+4,975)•5,2=
=15•5,2=78
(7,47-4,97)•10+12,7•1,2=
=2,5•10+15,24=
=25+15,24=
=40,24
Sper ca te-am ajutat. Succes!