123457854 - ans = ?
125255 + 546854 + 2 = ?
Nhanh nha
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I.Make question for with bold words(Đặt câu hỏi với từ in đậm):
1.It's ten to ten.
..........WHAT TIME IS IT?.........
2.The train is going to Nha Trang.
.......WHERE IS THE TRAIN GOING TO?........
3.Mr.Nam goes to work by car every day.
.........HOW DOES MR NAM GO TO WORK EVERYDAY?........
4.Lan is listening to music at the moment.
........WHAT IS LAN DOING AT THE MOMENT?......
II.Write the comparison sentences(Viết câu so sánh):
Example: 0.Hue / small / Hanoi Ans: Hue is smaller than Hanoi.
1.Lan / young / Hoa
Ans: LAN IS YOUNGER THAN HOA.
2.My uncle / old / my aunt
Ans: MY UNCLE IS OLDER THAN MY AUNT.
3.This ruler / long / that one
Ans: THIS RULER IS LONGER THAN THAT ONE.
4.This room / large / my room
Ans: THIS ROOM IS LARGER THAN MY ROOM.
I.Make question for with bold words(Đặt câu hỏi với từ in đậm):
1.It's ten to ten.
What time is it?
2.The train is going to Nha Trang.
Where is the train going to?
3.Mr.Nam goes to work by car every day.
How does Mr.Nam go to work every day?
4.Lan is listening to music at the moment.
What is Lan doing at the moment?
II.Write the comparison sentences(Viết câu so sánh):
Example: 0.Hue / small / Hanoi Ans: Hue is smaller than Hanoi.
1.Lan / young / Hoa Ans: Lan is younger than Hoa
2.My uncle / old / my aunt Ans: My uncle is older than my aunt
3.This ruler / long / that one Ans: This ruler is longer than that one
4.This room / large / my room Ans:This room is larger than my room
Hello, I am Hoang Anh ! And you ?
Yeah ! I am Chau, 11 Years old, I am a student at class 6D1.
1) 35
2) (30 + 905 : 5 + 9) - (2 x 5 + 8 x 5)
= (30 + 181 + 9) - [(2 + 8) x 5]
= (30 + 190) - (10 x 5)
= 220 - 50
= 170
3) 8 + 290 : \(\frac{ans}{290}\)- 845 + 555
= 8 + 290 : 1 - 845 + 555
= 8 + 290 - 845 + 555
= 298 - 290
= 8
Học tốt!!!
nhân từng hạng tử của giả thiết với 2 rồi cộng và trừ từng cái một là ra còn gì nx
Trình bày dài lắm
Ta có : \(\frac{x}{a+2b+c}=\frac{y}{2a+b-c}=\frac{z}{4a-4b+c}\)
=> \(\frac{a+2b+c}{x}=\frac{2a+b-c}{y}=\frac{4a-4b+c}{z}\)
=> \(\frac{a+2b+c}{x}=\frac{2\left(2a+b-c\right)}{2y}=\frac{4a-4b+c}{z}=\frac{a}{x+2y+z}\)(1)
=> \(\frac{2\left(a+2b+c\right)}{2x}=\frac{2a+b-c}{y}=\frac{4a+4b+c}{z}=\frac{b}{2x+y-z}\)(2)
=> \(\frac{4\left(a+2b+c\right)}{4x}=\frac{4\left(2a+b-c\right)}{4y}=\frac{4a-4b+c}{z}=\frac{c}{4x-4y+z}\)(3)
Từ (1);(2);(3) suy ra \(\frac{a}{x+2y+z}=\frac{b}{2x+y-z}=\frac{c}{4x-4b+z}\)
Ta có: A = 1.2.3 + 2.3.4 + 3.4.5 + ... + 18.19.20
=> 4A = 4(1.2.3 + 2.3.4 + 3.4.5 + ... + 18.19.20)
=> 4A = 1.2.3.4 + 2.3.4.4 + 3.4.5.4 +...... +18.19.20.4
=> 4A = 1.2.3.4 + 2.3.4(5 - 1) + 3.4.5.(6 - 2) +..... +18.19.20.(21 - 17)
=> 4A = 1.2.3.4 + 2.3.4.5 - 2.3.4 + 3.4.5.6 - 2.3.4.5 + ..... + 17.18.19.20 - 17.18.19.20
=> 4A =18.19.20
=> 4A = 6840
=> A = 1710
Đặt A=1.2.3+2.3.4+3.4.5+4.5.6+...+18.19.20
4A=(1.2.3+2.3.4+3.4.5+4.5.6+...+18.19.20)4
4A=1.2.3(4-0)+2.3.4(5-1)+3.4.5(6-2)+4.5.6(7-3)+...+18.19.20.(21-17)
4A=1.2.3.4+2.3.4.5-1.2.3.4+3.4.5.6-2.3.4.5+4.5.6.7-3.4.5.6+...+ 18.19.20.21-17.18.19.20
=>A =18.19.20.21
=>A+18.19.20.21/4
=> A=35910
ans la cai j bn
125255+546854+2=67211
mik làm xong bài c r
125255 + 546854 + 2 = ?
125255 + 546854 + 2 = 67211
Hok tốt