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Ответ дан
lizameow2112

Ответ:

1)-3,4+17=17-3,4=13,6

2) 6/19+(-8/19)=6-8/19=-2/19

3)-3,17+11,05=11,05-3,17=7,88

4)43frac{7}{8} +(-19frac{1}{6} )=frac{347}{8} -frac{115}{6} =frac{1548-345}{24} =frac{1203}{24}=5frac{3}{24}

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