Ответ:
1-1/4=3/4 1-2/5=3/5
3/4-5/8=1/8 3/5+1/5=4/5
А=1/8 4/5-3/10=1/2
Б=1/2
2)1-2/3=1/3 1-1/2=1/2
1/3-1/9=2/9 1/2+1/10=6/10
С=2/9 6/10-2/5=1/5
D=1/5
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Ответ:
1-1/4=3/4 1-2/5=3/5
3/4-5/8=1/8 3/5+1/5=4/5
А=1/8 4/5-3/10=1/2
Б=1/2
2)1-2/3=1/3 1-1/2=1/2
1/3-1/9=2/9 1/2+1/10=6/10
С=2/9 6/10-2/5=1/5
D=1/5