Question

21 Qual alternativa representa a
transformação correta: 775; 25/4;
88/20; 115/25

a)0,14; 6,25; 4,2; 46

b( 1,4; 6,25; 4,4; 4,6

c)1,4; 6,45; 4,4; 0,46​

Answer 1

Resposta:

a) Seja

x = 0,525252...

100x = 52,525252...

100x - x = 52,525252... - 0,525252

99x = 52

x = 52/99

b) Seja

x =0,555...

10x = 5,555...

10x - x = 5,555... - 0,555...

9x = 5

x = 5/9

c) Seja

100x = 12,444...

1000x = 124,444...

1000x - 100x = 124,444... - 12,444...

900x = 112

x = 112/900 = 56/450 = 28/225