А)
1 2/5 * 2/7 = 2/5 (м²)
ответ: S = 2/5 м².
Б)
6 − 1 9/12 ⋅ 3 + 36 ⋅ 7/21
1)1 9/12 ⋅ 3 = 4 3/4
2)36 ⋅ 7/21 = 12
3)6 - 4 3/4 = 1 1/4
4) 1 1/4 + 12 = 11/12
ответ: 6 − 1 9/12 ⋅ 3 + 36 ⋅ 7/21 = 11/12
2/5 м.
11/12
Пошаговое объяснение:
А)
1 2/5 * 2/7 = 2/5 (м²)
ответ: S = 2/5 м².
Б)
6 − 1 9/12 ⋅ 3 + 36 ⋅ 7/21
1)1 9/12 ⋅ 3 = 4 3/4
2)36 ⋅ 7/21 = 12
3)6 - 4 3/4 = 1 1/4
4) 1 1/4 + 12 = 11/12
ответ: 6 − 1 9/12 ⋅ 3 + 36 ⋅ 7/21 = 11/12
2/5 м.
11/12
Пошаговое объяснение: