Explicación paso a paso:
-4/3÷-1/3
4/3÷1/3
4/3×3
=4
-27/5÷3/5
-27/5×5/3
-27×1/3
=-9
28/5÷-7/25
-28/5×25/7
-4×5
=-20
0,9×7/15
9/10×7/15
3/10×7/15
=21/50
2,4÷-7
12/5÷(-7)
-12/5×1/7
=-12/35
hay estan todas
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Verified answer
Explicación paso a paso:
-4/3÷-1/3
4/3÷1/3
4/3×3
=4
-27/5÷3/5
-27/5×5/3
-27×1/3
=-9
28/5÷-7/25
-28/5×25/7
-4×5
=-20
0,9×7/15
9/10×7/15
3/10×7/15
=21/50
2,4÷-7
12/5÷(-7)
-12/5×1/7
=-12/35
hay estan todas