Explicación paso a paso:
1. 572×4/7+3/7
= 2288/7+3/7
=2291/7
2. 577×(-30/9)÷(-6/27)
=577×30/9×27/6
=577×5×3
=8655
3. =-194×1/3×7
= _1358/3
4.=_2935/17+2/3
= _8771/51
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Explicación paso a paso:
1. 572×4/7+3/7
= 2288/7+3/7
=2291/7
2. 577×(-30/9)÷(-6/27)
=577×30/9×27/6
=577×5×3
=8655
3. =-194×1/3×7
= _1358/3
4.=_2935/17+2/3
= _8771/51