Răspuns:
a) 0,25+3,6=3,85
2,7+1,3=4,0
0,125+102=102,125
2,104+5,2=7,304
b) 2,5-0,4=2,1
2-0,02=1,98
9,2-7,35=1,85
10,1-5,05=4,95
C) 2,8•0,03=0,084
1,9•2,13=4,047
1,03•1,8=1,854
21,01•0,3=6,303
D)10,24:3,2=3,2
10,32:4,8=2,15
0,4389:10,5=0,0418
271,909:20,9=13,01