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\(\frac{0,18+1230+0,9\cdot4567\cdot2+3\cdot5310\cdot0,6}{1+4+7+10+...+52+55-514}\)
Biến đổi tử số . Ta có :
\(\left(0,18\cdot10\right)\cdot123+\left(0,9\cdot2\right)\cdot4567+\left(3\cdot0,6\right)\cdot5310\)
\(=1,8\cdot123+1,8\cdot4567+1,8\cdot3510\)
\(=1,8\cdot\left(123+4567+3510\right)\)
\(=1,8\cdot10000\)
\(=18000\)
Biến đổi mẫu số . Ta có :
Tổng : \(1+4+7+10+...+52+55\)có : \(\left(55-1\right):3+1=19\)( số )
Kết quả của tổng trên là :
\(\left(1+55\right)\cdot19:2=534\)
Kết quả mẫu số là :
\(534-514=20\)
Chia trả chữ số cho mẫu số ta được :
\(\frac{18000}{20}\)\(=900\)
[y + 3] + [y + 7] + [y + 11] + ... + [y + 79] = 860
20y + (3 + 7 + 11 + ..... + 79) = 860
Áp dụng của chúng tôi và chúng tôi:
3 + 7 + 11 + ..... + 79 = 20. 41 = 820
=> 20y + 820 = 860
=> 20y = 40
=> y = 2
[y + 3] + [y + 7] + [y + 11] + ... + [y + 79] = 860
20y + (3 + 7 + 11 + ..... + 79) = 860
Áp dụng của chúng tôi và chúng tôi:
3 + 7 + 11 + ..... + 79 = 20. 41 = 820
=> 20y + 820 = 860
=> 20y = 40
=> y = 2
8 giờ 3 phút 5 giây - 0,15 ngày
= 8 giờ 3 phút 5 giây - 3 giờ 10 phút
= 4 giờ 53 phút 5 giây
Vậy 1 công nhân trong 1 ca dệt vượt: 60:3:2=10m vải
7 công nhân trong 5 ca dệt vượt: 10.7.5=350m vải.
bạn vào chỗ này : http://olm.vn/hoi-dap/question/167027.html
TUI TRA LOI LA : GIUP MK VOI. MK LA NG DAT RA CAU NAY NE !!!!!!!!!!!!!!!!!!! DUNG 1000% LUON LUON DO!!!!!!!!!!!!!!@#$%^&*()_+ơ}:"|><? CUNGDEP DAY
\(\frac{1}{3\times4}=\frac{1\times1}{3\times4}=\frac{1}{3}\times\frac{1}{4}\)
\(\frac{1}{a\times\left(a+1\right)}=\frac{1\times1}{a\times\left(a+1\right)}=\frac{1}{a}\times\frac{1}{a+1}\)
Hanoi has many scenic spots, but the most famous is Hoan Kiem Lake - located in the centre of the capital.
From above looking down on the lake **** a giant mirror with blue. Around the lake is the willow as the willowy girl long hair silhouetted let fall into the water. In the middle of the lake is covered with a layer Turtle Tower ancient moss. Besides The Huc bridge red lipstick, curved **** crawfish tourists to come Ngoc Son. Ho was more brilliant on holidays. In the morning, the family often came up here to take pictures The Huc bridge, Ngoc Son temple ceremony in health and happiness. The baby's parents were present for the dress, very pretty clothes running around Thap But. The leaning tower built of stone blue sky. It's more **** writing history for Hanoi capital. At night, the trees along the lake illuminated by lanterns hanging from the branches. The lights that shine down on the country as thousands of twinkling stars. The waterfront, we arrange the colorful lights. Flowers, flags and slogans hiệ hung everywhere. View the holidays really exciting.
Not only that, the lake was beautiful seasonal. In the spring, the trees came crashing buds emerge. He compiled sun rays down as the weather was warm and pleasant. In the summer, the trees Phuog great, Lagerstroemia gorgeous bloom. Autumn, the lake is calm, not one ripple. Sky, blue, cool weather. Winter, morning, steam creates a thin mist, seen from afar looks fanciful.
Hoan Kiem Lake area associated with the sword of King Le finish for gold turtle. It's also attracts many visitors traveling to the capital. I'm proud to be a citizen of Hanoi !
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mk lấy trên mạng về đấy
Bài làm
0,18.1230+0,9.4567.2+3.5310.0,6/1+4+7+10+...+52+55-414
=0,18.1230+0,18.4567+0,18.5310/1+4+7+10+...+52+55-414
=0,18.(1230+4567+5310)/(55-1):3+1-414
=0,18.11107/(55+1).19:2-414
=1999,26/532-414
=1999,26/118.
Mk làm đại, HIHI !