1) 1 5/42.
2) 2/15.
3) 37/60.
4) 11/48.
/- дробная черта.
Пошаговое объяснение:
5/6+2/7= 5×7/6×7+2×6/7×6= 35/42+12/42= 47/42= 1 5/42.
11/15-3/5= 11/15-3×3/5×3= 11/15-9/15= 2/15.
3/20+7/15= 3×3/20×3+7×4/15×4= 9/60+28/60= 37/60.
13/16-7/12= 13×3/16×3-7×4/12×4= 39/48-28/48= 11/48.
1) 1 5/42.
2) 2/15.
3) 37/60.
4) 11/48.
/- дробная черта.
Пошаговое объяснение:
5/6+2/7= 5×7/6×7+2×6/7×6= 35/42+12/42= 47/42= 1 5/42.
11/15-3/5= 11/15-3×3/5×3= 11/15-9/15= 2/15.
3/20+7/15= 3×3/20×3+7×4/15×4= 9/60+28/60= 37/60.
13/16-7/12= 13×3/16×3-7×4/12×4= 39/48-28/48= 11/48.