Вычислите: 1 2/9+3/9-1 4/9= 3 -1 2/17+2 2/17= 4 3/5-2 4/5+3 3/5= 2 2/7+2/7-1 3/7=

Question

Вычислите:
1 2/9+3/9-1 4/9=
3 -1 2/17+2 2/17=
4 3/5-2 4/5+3 3/5=
2 2/7+2/7-1 3/7=

Answer 1

1 2/9+3/9-1 4/9=1/9
3-1 2/17+2 2/17=1 15/17+2 2/17=4
4 3/5-2 4/5+3 3/5=5 2/5
2 2/7+2/7-1 3/7=1 1/7

Comments

14-3 8/15+10 4/15=10 7/15+10 4/15=20 11/15

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28 1/10-15 9/10-12 1/10=28 1/10-28=1/10

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23-20 3/5-2 2/5=23-23=0

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15 7/11-4 6/11+3 4/11=11 1/11+3 4/11=14 5/11