encontre a fração geratriz das seguintes dízimas:
a) 0,3333...
b) 0,4333...
c) 0,765765...
d) 5,0111...
Soluções para a tarefa
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DUAS MANEIRAS DE FAZER
a) 0,3333...
x = 0,333... ( 10)Multiplica
10x = 3,333...
10x = 3,333...
x = 0,333...(subtrai)
----------------
9x = 3,000...
9x = 3
x = 3/9 ou (divide AMBOS por 3) = 1/3
OUTRA MANEIRA
3 - 0 3 3: 3 1
0,333... = -----------= ----------- OU simplifcando ----------- = -------
9 9 9 : 3 3
b) 0,4333...
x = 0,4333... (100) multiplica
100x = 43,3333... (10) multiplica
1000x = 433,3333...
1000x = 433,333...
100x = 43,333...(subtrai)
-------------------------
900x = 390,000...
900x = 390
x = 390/900 ou simplificando 13/30
c) 0,765765...
x = 0,767676... (100)multiplica
100x = 76,767676... (100)multiplica
10.000x = 7676,767676...
10.000x = 7676,767676...
100x = 76,767676... subtrai
---------------------------------
9900 x = 7600,00000..
9900x = 7600
x = 7600/9900 ou 76/99
0,767676... = 7600/9900
d) 5,0111...
x = 5,0111... (100) multiplica
100x = 501,111... (10) multiplica
1000x = 5011,111...
1000x = 5011,111...
100x = 501,111... subtrai
----------------------------
900x = 4510,000...
900x = 4510
x = 4510/900
5,01111... = 4510/900 ou 451/90
a) 0,3333...
x = 0,333... ( 10)Multiplica
10x = 3,333...
10x = 3,333...
x = 0,333...(subtrai)
----------------
9x = 3,000...
9x = 3
x = 3/9 ou (divide AMBOS por 3) = 1/3
OUTRA MANEIRA
3 - 0 3 3: 3 1
0,333... = -----------= ----------- OU simplifcando ----------- = -------
9 9 9 : 3 3
b) 0,4333...
x = 0,4333... (100) multiplica
100x = 43,3333... (10) multiplica
1000x = 433,3333...
1000x = 433,333...
100x = 43,333...(subtrai)
-------------------------
900x = 390,000...
900x = 390
x = 390/900 ou simplificando 13/30
c) 0,765765...
x = 0,767676... (100)multiplica
100x = 76,767676... (100)multiplica
10.000x = 7676,767676...
10.000x = 7676,767676...
100x = 76,767676... subtrai
---------------------------------
9900 x = 7600,00000..
9900x = 7600
x = 7600/9900 ou 76/99
0,767676... = 7600/9900
d) 5,0111...
x = 5,0111... (100) multiplica
100x = 501,111... (10) multiplica
1000x = 5011,111...
1000x = 5011,111...
100x = 501,111... subtrai
----------------------------
900x = 4510,000...
900x = 4510
x = 4510/900
5,01111... = 4510/900 ou 451/90
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