Question

calcule e expresse o resultado na forma de fraçao irredutivel
a- 1-0,5+0,222         b- 0,444...+0,4-1sobre2

Answer 1

a-1-0,5+0,222...
0,5=5/10=1/2
x=0,222..
10x=2,222...
10x-x=2,222...-0,222...
9x=2
x=2/9

1-1/2+2/9=
18/18-9/18+4/18=
9/18+4/18=
13/18

b-0,444...+0,4-1/2
0,444
x=0,444
10x=4,444
10x-x=4,444-0,444
9x=4
x=4/9

0,4=4/10=2/5

4/9+2/5-1/2=
40/90+36/90-45/90=
76/90-45/90
31/90