nyatakan dalam bentuk a/ b bilangan berikut 1. 2,3333. 2. 4,353535

Kelas 7 Matematika
Bab Pecahan

1] 2,3333 = 2 + 0,3333......

0,3333.... = a
0,3333... x 10 = a x 10
10 a = 3,333...

10a - a = 3,333... - 0,333...
9a = 3
a = 3/9
a = 1/3

2,333... = 2 1/3
2,333... = 7/3

b] 4,353535... = 4 + 0,353535...

0,353535...  = b
0,353535 x 100 = b x 100
35,3535... = 100b

100b - b = 35,3535... - 0,3535...
99b = 35
b = 35/99

4,3535... = 4 35/99
4,3535.. = 431/99