Question

Помогите 4/7 - (5/11 -3/7)3/8 - (1/9-5/8)6. 5/8-(1.3/4 - 2.3/8Раскройте скобки и найдите значение выражений.

Answer 1

4/7 - (5/11 -3/7)=6/11

3/8 - (1/9-5/8)=8/9

6. 5/8-(1.3/4 - 2.3/8=15/4=3.3/4=9/4=2.1/4=1/2=о,5

Answer 2

Давайте выполним расчеты по порядку:

1. 4/7 - (5/11 - 3/7) = 4/7 - ((5/11) * (7/7) - (3/7) * (11/11)) = 4/7 - (35/77 - 33/77) = 4/7 - 2/77 = (308/539) - (14/77) = (30811 - 147)/(539*11) = 3087/5929

2. 3/8 - (1/9 - 5/8)6 = 3/8 - ((1/9) * (8/8) - (5/8) * (9/9)) * 6 = 3/8 - (8/72 - 5/8) * 6 = 3/8 - (-37/72) * 6 = 3/8 + (37/12) = (9/24) + (111/24) = 120/24 = 5

3. 5/8 - (1.3/4 - 2.3/8) = 5/8 - (3.25/8 - 1.4375/8) = 5/8 - 1.8125/8 = (58 - 1.81258)/(8*8) = 22.5/32 = 45/64

Таким образом, ответы на выражения равны:

• 4/7 - (5/11 - 3/7) = 3087/5929
• 3/8 - (1/9 - 5/8)6 = 5
• 5/8 - (1.3/4 - 2.3/8) = 45/64