587. 1) 5/11×8/15, -5/11×(-8/15);2) 9/16×5/12,-9/16×(-5/12);3) 3/14×7/10,-3/14×(-7/10).

Question

Математика: 587. 1) 5/11×8/15, -5/11×(-8/15);2) 9/16×5/12,-9/16×(-5/12);3) 3/14×7/10,-3/14×(-7/10).​

Anion20 · Answer

587.1) 5/11×8/15= 8/332) 9/16×5/12= 15/643) 3/14×7/10= 3/20-5/11×(-8/15)= 8/33-9/16×(-5/12)= 15/64-3/14×(-7/10)= 3/20....

587. 1) 5/11×8/15, -5/11×(-8/15);
2) 9/16×5/12,
-9/16×(-5/12);
3) 3/14×7/10,
-3/14×(-7/10).