Cum se faceau aceste exercitii?transformati sub forma de fr ordinara numerele:
1. 21,(34)=
2. 2,(075)=
3. 1,23(13)=
4. 0,06(5)=
5. 12,3(4)+ 0,5(6)=
6. 7,(8)-3,4(5)=
3,8* 0,(5)=
3,(63):1,(27)=

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vrei rezultat sau vrei rezolvari desfasurate ca sa intelegi?

Răspunsuri

Cel mai inteligent răspuns!
2014-07-25T16:13:18+03:00
1. 21,(34)= (2134-21)/99= 2113/99
2. 2,(075)= (2075-2)/999=2073/999
3. 1,23(13)= (12313-123)/9900=12190/9900
4. 0,06(5)= (65-6)/900=59/900
5.  12,3(4)+ 0,5(6)=(1234-123)/90+ (56-5)90= 1111/90+51/90=1162/90
6. 7,(8)-3,4(5)= 78/9-(345-34)/90=780/90-311/90 =469/90
3,8* 0,(5)= 38/10*5/9=38/2*1/9=19/9
3,(63):1,(27)=
(363-3)/99:(127-1)/99=360/99*99/126=40/14=20/7
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