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Calculati. 3+2*1/5     5-3*1/4     0,25:0,5*1/4    1/2+2*(0,25+3)

Răspuns :

HerminaAnaMaria
3+2·1/5=3+2/5=17/5
5-3·1/4=5-3/4=17/4
0,25:0,5·1/4=25/100:5/10·1/4=25/100:5/40=25/100·40/5=2
1/2+2·(0,25+3)=1/2+2·(1/4+3)=1/2+1/2+6=7

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