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Lau333223
a fost răspuns

efectuati adunarile,utilizand fractii ordinare :
a) 5,4+1/2
b) 2,25+1/8+1,(2)
c)15/8 +0,45+7/4

Răspuns :

Emy78
a. 5,4+1/2=54/10+1/2=54/10+5/10=59/10=5,9
b. 225/100+125/1000+1 2/9=
=2250/1000+125/1000+11/9=
=2375/1000+11/9=
=21375/9000+11000/9000=
=32375/9000=6475/1800=1295/360=259/72
c. 15·125/1000+45/100+7·25/100=
=1875/1000+450/1000+1750/1000=
=4075/1000=4,075

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