Пошаговое объяснение:
1 5/6:(2/3-2/7)=11/6:(14-6)/21=
=11/6:8/21=11/6×21/8=11/2×7/8=
=77/16=4 13/16
1) 2/3 - 2/7 = 14/21 - 6/21 = 8/21
2) 1 5/6 : 8/21 = 11/6 * 21/8 = 11/2 * 7/8 = 77/16 = 4. 13/16
Пошаговое объяснение:
1 5/6:(2/3-2/7)=11/6:(14-6)/21=
=11/6:8/21=11/6×21/8=11/2×7/8=
=77/16=4 13/16
Пошаговое объяснение:
1) 2/3 - 2/7 = 14/21 - 6/21 = 8/21
2) 1 5/6 : 8/21 = 11/6 * 21/8 = 11/2 * 7/8 = 77/16 = 4. 13/16