Question

Calculați: 1/7+1/9;1/2+1/4+1/8;1/6+2/3+1/2;1/2+1/5+3/10;1/2+1/4;1/2+4/8;2/4+4/8;4/16+2/8;1/8+2/4;1/16+2/32;8/32+2/8

Answer 1

1/7 +1/9 = 9/63+7/63 = 16/63

1/2 + 1/4+ 1/8 = 4/8+2/8+1/8 = 7/8 

1/6+2/3+1/2 =  1/6+4/6+3/6 = 8/6 = 4/3

1/2 + 1/5+ 3/10 = 5/10 + 2/10 +3/10 = 10/10 =1 

1/2 + 1/4 = 2/4+1/4 = 3/4

1/2 + 4/8 = 4/8+4/8 = 8/8 = 1

2/4 + 4/8 = 4/8 + 4/8 = 8/8 = 1

4/16 + 2/8 = 4/16 + 4/16 = 8/16 = 1/2

1/8+2/4 = 1/8 + 4/8 = 5/8 

1/16 +2/32 = 2/32 +2/32 = 4/32 = 1/8

8/32 +2/8 = 8/32 + 8/32 = 16 /32 = 1/2