3/8 или 0,375
Объяснение:
1/6+1/12=2/12+1/12=3/12=1/4
1/4+1/20=5/20+1/20=6/20=3/10
3/10+1/30=9/30+1/30=10/30=1/3
1/3+1/42=14/42+1/42=15/42=5/14
5/14+1/56=20/56+1/56=21/56=3/8
3/8 или 0,375
Объяснение:
1/6+1/12=2/12+1/12=3/12=1/4
1/4+1/20=5/20+1/20=6/20=3/10
3/10+1/30=9/30+1/30=10/30=1/3
1/3+1/42=14/42+1/42=15/42=5/14
5/14+1/56=20/56+1/56=21/56=3/8