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6 tháng 7 2017

là 177,8 nha bạn

6 tháng 7 2017

    \(\left(57+58+59+60+61+62+63+64+65+66+67+68+69+70\right):5\)

\(=\left[\left(70+57\right).14:2\right]:5\)

\(=\left[127.14:2\right]:5\)

\(=1778:2:5\)

\(=889:5\)

\(=\frac{889}{5}\)

20 tháng 2 2017

các phép tính trong ngoặc đều bằng 0 

suy ra chỉ còn 2005 +69 = 2074 
 

21 tháng 2 2022

mày bị điên

26 tháng 2 2017

ta có: 2005 + 53-54-55+56-57-58-59+60+61-62-63+64+65-66-67+68+69

      = 2005+(53-54-55+56)+(57-58-59+60)+(61-62-63+64)+(65-66-67+68)+69

      = 2005+0+0+0+0+69

      = 2005+69

      = 2074

12 tháng 4 2016

A)10000

B)2074

4 tháng 11 2018

a ) bằng 0.

b ) bằng 65.

4 tháng 11 2018

a. (45-63+18) x (1+2+3+4+5+6+7+8+9)

= 0 x (1+2+3+4+5+6+7+8+9) = 0

b. 60-61+62-63+64-65+66-67+68-69+70

= 60 + (-61-69)+(62+68)+(-63-67)+(64+66)-65+70

= 60 + (-130)+130+(-130)+130-65-70

= 60 + (-130+130) + (-130+130)-65+70

= 60 - 65 + 70 = 65

4 tháng 4 2022

300

31 tháng 1 2023

ta có: 2005 + 53-54-55+56-57-58-59+60+61-62-63+64+65-66-67+68+69

      = 2005+(53-54-55+56)+(57-58-59+60)+(61-62-63+64)+(65-66-67+68)+69

      = 2005+0+0+0+0+69

      = 2005+69

      = 2074

31 tháng 1 2023

h

 

V. Match the hobbies from 61 to 70 to its suitable description from A to J61. Reading        62. Traveling        63. Fishing        64. Crafts    65. Television66. Bird Watching    67. Collecting        68. Music        69. Games    70. Gardening_______A. The hobby has changes dramatically in recent years; many networks offer endless on-demand viewing options, and because it doesn’t require much effort, it’s an activity that many people take part in daily._______B. Played, heard, and loved...
Đọc tiếp

V. Match the hobbies from 61 to 70 to its suitable description from A to J

61. Reading        62. Traveling        63. Fishing        64. Crafts    65. Television

66. Bird Watching    67. Collecting        68. Music        69. Games    70. Gardening

_______A. The hobby has changes dramatically in recent years; many networks offer endless on-demand viewing options, and because it doesn’t require much effort, it’s an activity that many people take part in daily.

_______B. Played, heard, and loved worldwide, it brings people together. Whether it’s listening at home or taking in a concert, it can be enjoyed anywhere.

_______C. If your idea of a fun Friday night is cozying up with a book, you’re certainly not alone.  It’s accessible due to the fact that it’s inexpensive, and it allows people to explore new and exciting worlds, and expand their knowledge.

D. If you need a break from the daily grind, unwind with a fishing trip. Whether you’re doing this for food or just for fun, the hobby is a great way to relax and enjoy nature.

_______E. This hobby continues to grow in popularity, thanks to the fact that virtually anyone can participate. It doesn’t require much equipment. The hobby draws people young and old, making it an excellent intergenerational activity.

_______F. Sure, they get a bad rap, but let’s face them… people love them! There are games to suit virtually any personality and preference. It allows gamers to connect with others online.

_______G. Whether it’s a trip across the ocean or exploring the next town over, it is an exciting hobby virtually anyone can participate in. From the planning stage to the trip itself, it gives folks something to look forward to, along with a brief escape from reality.

_______H. There’s comfort in being surrounded by the things we love, which is one reason why it is such a popular activity. From stamps and coins to action figures and dolls, there are countless collecting options.

_______I. Creativity is universal, and so is the art of crafting. There are many avenues crafters can take, from knitting and crochet to paper crafts and beading.

_______J. Many people work to produce food, while others appreciate that it passes the time and offers a sense of accomplishment. Some folks enjoy giving others food from their work, and others sell produce for extra cash.

 

1
21 tháng 2 2022

A65

B68

C61

D63

E66

F69

G62

H67

I64

J70

1 tháng 7 2021

mình làm vài câu cho bạn tham khảo,các câu còn lại thì bạn làm tương tự thôi

23.\(\sqrt{14-2\sqrt{33}}=\sqrt{\left(\sqrt{11}\right)^2-2.\sqrt{11}.\sqrt{3}+\left(\sqrt{3}\right)^2}\)

\(=\sqrt{\left(\sqrt{11}-\sqrt{3}\right)^2}=\left|\sqrt{11}-\sqrt{3}\right|=\sqrt{11}-\sqrt{3}\)

28. \(\sqrt{25-4\sqrt{6}}=\sqrt{\left(2\sqrt{6}\right)^2-2.2\sqrt{6}.1+1^2}=\sqrt{\left(2\sqrt{6}-1\right)^2}\)

\(=\left|2\sqrt{6}-1\right|=2\sqrt{6}-1\)

29.\(\sqrt{14-8\sqrt{3}}=\sqrt{14-2\sqrt{48}}=\sqrt{\left(\sqrt{8}\right)^2-2\sqrt{6}.\sqrt{8}+\left(\sqrt{6}\right)^2}\)

\(=\sqrt{\left(\sqrt{8}-\sqrt{6}\right)^2}=\left|\sqrt{8}-\sqrt{6}\right|=\sqrt{8}-\sqrt{6}\)

 

1 tháng 7 2021

nhìn rối mắt quá bạn ơi