Question

.50+.4+.08
$\frac{1}{2} + \frac{2}{5} + \frac{2}{25}$

Answer 1

1/2 + 2/5 + 2/25
Put 1/2 + 2/5 + 2/25 over the common denominator 50. 1/2 + 2/5 + 2/25 = 25/50 + (10×2)/50 + (2×2)/50:
25/50 + (10×2)/50 + (2×2)/50
10×2 = 20:
25/50 + 20/50 + (2×2)/50
2×2 = 4:
25/50 + 20/50 + 4/50
25/50 + 20/50 + 4/50 = (25 + 20 + 4)/50:
(25 + 20 + 4)/50

 | 2 | 5
 | 2 | 0
+ | | 4
 | 4 | 9:
Answer:  49/50