Răspuns:
4.......a) 6,25-3,14=3,11
b) 8,16- 6,21= 1,95
c) 3,8- 0,27= 3,53
d) 4,7- 7,08=-2,38
e) 12- 2,14= 12,00- 2,14= 9,86
f) 23- 5,28= 17,72
g,) 16,399- 8,25= 8,149
h) 45,888-7,08=38,808
6.16,3+(0,28+3,7)=(16,3+0,28)+3,7=20,28
b) 25,8+(0,2+6,25)=(25,8+0,2)+6,25=32,25
c) 14,123+(5,71+7,29)=14,123+13=27,123
d) (27,194+6,82)+12,18=27,194+(6,82+12,18)=46,194
e) (7,88+3,153)-5,88=7,88+(3,153-5,88)=5,153
f)(73,185+18,68)-4,56=73,185+(18,68-4,56)=87,305