пожалуйста решите быстрей даю балов
[tex](1.3 + \frac {23}{30 } + \frac{4}{15}) \times ( - \frac{2}{7} - 2 \times \frac{2}{3} + 2 \times \frac{2}{7}) = \\ \\ 7 \div 5 \times \frac{1}{11} - 5 \times \frac{5}{6} \div 4 - \frac{9}{8} - \frac{1}{24} = \\ \\ \\ \\ - (1 \frac{11}{24 } - 1 \times \frac{13}{26} )\div 9 - 10 \times (5 \times \frac{7}{10} - 3 \times \frac{3}{4} [/tex]
[tex](1.3 + \frac {23}{30 } + \frac{4}{15}) \times ( - \frac{2}{7} - 2 \times \frac{2}{3} + 2 \times \frac{2}{7}) = \\ \\ 7 \div 5 \times \frac{1}{11} - 5 \times \frac{5}{6} \div 4 - \frac{9}{8} - \frac{1}{24} = \\ \\ \\ \\ - (1 \frac{11}{24 } - 1 \times \frac{13}{26} )\div 9 - 10 \times (5 \times \frac{7}{10} - 3 \times \frac{3}{4} [/tex]
Answers & Comments
Ответ:
Пошаговое объяснение:
1.
1) 1,3 + 23/30 + 4/15 = 1. 3/10 + 23/30 + 4/15 = 1. 9/30 + 23/30 + 8/30 = 1. 40/30 = 2. 10/30 = 2. 1/3
2) 2 * (2/3 + 2/7) = 2 * (14/21 + 6/21) = 2 * 20/21 = 40/21 = 1. 19/21
3) -2/7 - 1. 19/21 = -6/21 - 1. 19/21 = -1. 25/21 = -2. 4/21
4) 2. 1/3 * (-2. 4/21) = 7/3 * (-46/21) = 1/3 * (-46/3) = -46/9 = -5. 1/9
2.
1) 7 : 5 = 7/5
2) 7/5 * 1/11 = 7/55
3) 5 * 5/6 = 25/6
4) 25/6 : 4 = 25/6 * 1/4 = 25/24 = 1. 1/24
5) 7/55 - 1. 1/24 - 9/8 - 1/24 =
7/55 - (1. 1/24 - 9/8 - 1/24) =
7/55 - (1. 1/24 - 27/24 - 1/24) =
7/55 - (25/24 - 27/24 - 1/24) =
7/55 - (-3/24) = 7/55 + 1/8 = 56/440 + 55/440 = 111/440
Ответ:
Пошаговое объяснение:
(1,3 + 23/30 + 4/15) * ( - 2/7 - 2 * 2/3 + 2 * 2/7) = - 5 1/9
1) 1,3 + 23/30 + 4/15 = 1 3/10 + 23/30 + 4/15 = 1 9/30 + 23/30 + 8/30 =
= 2 10/30 = 2 1/3
2) 2 * 2/3 + 2 * 2/7 = 2 * 14/21 + 2 * 6/21 = 2 * 20/21 = 40/21 = 1 19/21
3) -2/7 - 1 19/21 = -6/21 - 1 19/21 = -1 25/21 = -2 4/21
4) 2 1/3 * (-2 4/21) = 7/3 * (-46/21) = 1/3 * (-46/3) = -46/9 = -5 1/9
2. 7 : 5 * 1/11 - 5 * 5/6 : 4 - 9/8 - 1/24 = 111/440
1) 7 : 5 = 1, 4 = 1 2/5
2) 1 2/5 * 1/11 = 7/5 * 1/11 = 7/55
3) 5 * 5/6 = 25/6
4) 25/6 : 4 = 25/6 * 1/4 = 25/24 = 1 1/24
5) 1 1/24 - 9/8 - 1/24 = 25/24 - 27/24 - 1/24 = - 3/24 = - 1/8
6) 7/55 + 1/8 = 56/440 + 55/440 = 111/440
последнее по всей видимости не дописано