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Ex 3 si 4 va rog!Dau coroana

Ex 3 Si 4 Va RogDau Coroana class=

Răspuns :

3. a) 11,4+3,52-0,312=
=11,400+3,520-0,312
=14,920-0,312
=14,608
b) 46,15-19,67=26,48
d) 25+9,78-0,04=34,78-0,04=34,74
e) 23,45-3,7²=23,45-13,69=9,76

4. a)
x-1,34<2,3
x=2,3+1,34
x=3,64
=> x= 3,63

b) x+4,77<_ 6,03
x=6,03-4,77
x=1,26
=> x= 1,25