72+73+74-75-76-60+8=??
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PB
4
16 tháng 9 2018
71 + 72 + 73 + 74 + 75 + 76 + 77 + 78 + 79
= ( 71 + 79 ) + ( 72 + 78 ) + ( 73 + 77 ) + ( 74 + 76 ) + 75
= 150 + 150 + 150 + 150 + 75
= 150 x 4 + 75
= 600 + 75
= 675
Tìm x :
X x 7 + X x 2 = 108
X x ( 7 + 2 ) = 108
X x 9 = 108
X = 108 : 9
X = 12
16 tháng 9 2018
\(71+72+73+74+75+76+77+78+79\)
\(=\left(71+79\right)+\left(72+78\right)+\left(73+77\right)+\left(74+76\right)+75\)
\(=150+150+150+150+75\)
\(=600+75\)
\(=675\)
\(X\)x\(7+X\)x\(2=108\)
\(X\)x\(\left(7+2\right)=108\)
\(X\)x\(9=108\)
\(X=108:9\)
\(X=12\)
Vậy \(X=12\)
AH
Akai Haruma
Giáo viên
2 tháng 12 2023
Bài 1:
a. $=(-25)(-4)(-35)=100(-35)=-3500$
b. $=16-10=6$
c. $=180-(-16)-(-36)=180+16+36=232$
d. $=250-200:[1(-3)^2+(-8)]$
$=250-200:(9-8)=250-200=50$
AH
Akai Haruma
Giáo viên
2 tháng 12 2023
2.
$60+2(12-x)=-48$
$2(12-x)=60-(-48)=60+48=108$
$12-x=108:2=54$
$x=12-54=-42$
AH
Akai Haruma
Giáo viên
29 tháng 11 2023
Bài 1:
a. $=(-25)(-4)(-35)=100(-35)=-3500$
b. $=16-10=6$
c. $180-(-16)-(-36)=180+16+36=196+36=232$
d. $=250-200:[2000.(-3).2-6]$
$=250-200:[2000.(-6)+(-6)]$
$=250-200:[(-6)(2000+1)]=250-200[(-6).2001]$
$=250+200.6.2001=250+2401200=2401450$
AH
Akai Haruma
Giáo viên
29 tháng 11 2023
Bài 2:
$60+2(12-x)=-48$
$2(12-x)=-48-60=-108$
$12-x=-108:2=-54$
$x=12-(-54)=66$
KY
4 tháng 8 2021
72, Let’s go to the cinema tonight.
Shall ………………… we go to the cinema tonight?………………
73, What is your weight?
How ……heavy are you?……………………………………………………
74, What a lovely cat!
How………………………… lovely the cat is!……………………………………
75, 1, Nam will be eighteen next month.
It will be ……………… Nam's eighteenth birthday next month.…………………………………………
76, When is your birthday?
What is ………………… your date of birth?………………………………………
77, Where were you born?
What is …………………… your birthplace?……………………………………
78, Hoang will be eighteen next month.
It will be ………………… Hoang's eighteenth birthday next month.………………………………………
79, It takes me two hours to get to Hanoi by motorbike.
I spend …………………… two hours getting to Hanoi by motorbike.……………………………………
80, My house is smaller than his one.
His house ……… is bigger than my house.………………………………………………
81, She is able to speak English to her teacher.
She can ……………… speak English to her teacher.…………………………………………
82, The black car is cheaper than the red one
The red car ………………… is more expensive than the black one…………………………………………………
4 tháng 8 2021
72, Let’s go to the cinema tonight.
Shall we go to the cinema tonight?………………………………… 73, What is your weight? How heavy are you………………………………………………………… 74, What a lovely cat! How lovely the cat is……………………………………………………………… 75, 1, Nam will be eighteen next month. It will be Nam's eighteenth birthday next month………………………………………………………… 76, When is your birthday? What is your birthday'day?………………………………………………………… 77, Where were you born? What is your hometown………………………………………………………… 78, Hoang will be eighteen next month. It will be Hoang's eighteenth birthday next month………………………………………………………… 79, It takes me two hours to get to Hanoi by motorbike. I spend 2 hours getting to HN by bike………………………………………………………… 80, My house is smaller than his one. His house is bigger than my……………………………………………………… 81, She is able to speak English to her teacher. She can speak English to her teacher………………………………………………………… 82, The black car is cheaper than the red one The red car is more expensive than the black one……………………………………………………………………
9 tháng 4 2021
71. The Olympic Games are the international events which take place every four years in different cities.
72. Taxi is difficult to get during rush hour.
73. Can ditionaries be used by students?
74. I am used to getting up early to learn English.
75. Television progams are interesting to watch.
76. After they had carried the Olympic torch into the stadium, games began.
77. When I got to the theater, the movie had already started.
78. How long have you learnt English?
79. The girl whose parents live in Hanoi invited me to spend my summer holidays there.
I0. The man who is in black uniform is the referee.
81. Try to use your goods as economically as you can.
82. It is one of the most expensive cars in the world.
83. The games are not exciting enough to attract many children.
84. Mr. Nam is said to be a famous doctor.
85. He is not intelligent enough to understand what you say.
H9
HT.Phong (9A5)
CTVHS
10 tháng 11 2023
\(A=7+7^2+7^3+7^4+7^5+7^6+7^7+7^8\)
\(A=\left(7+7^3\right)+\left(7^2+7^4\right)+\left(7^5+7^7\right)+\left(7^6+7^8\right)\)
\(A=7\cdot\left(7+7^2\right)+7^2\cdot\left(1+7^2\right)+7^5\cdot\left(1+7^2\right)+7^6\cdot\left(1+7^2\right)\)
\(A=7\cdot50+7^2\cdot50+7^5\cdot50+7^6\cdot50\)
\(A=50\cdot\left(7+7^2+7^5+7^6\right)\)
\(A=5\cdot10\cdot\left(7+7^2+7^5+7^6\right)\)
Ta có: 5 ⋮ 5
⇒ \(A=5\cdot10\cdot\left(7+7^2+7^5+7^6\right)\) ⋮ 5 (đpcm)
NT
Nguyễn Thị Thương Hoài
Giáo viên
VIP
10 tháng 11 2023
A = 7 + 72 + 73 + 74 + 75 + 76 + 77 + 78
A = (7 + 73) + (72+ 74) + (75 + 77) + (76 + 78)
A = 7.(1 + 72) + 72.(1 + 72) + 75.(1 + 72) + 76.(1 + 72)
A = 7.( 1 + 49) + 72.( 1 + 49) + 75.(1 + 49) + 76. (1 + 49)
A = 7.50 + 72.50 + 75.50 + 76.50
A = 50.(7 + 72 + 75 + 76)
Vì 50 ⋮ 5 nên A = 50.(7 + 72 + 76) ⋮ 5 đpcm
ML
16 tháng 3 2023
Program HOC24;
var i: byte;
begin
for i:=0 to 76 do write(i,' ');
readln
end.
72+73+74-75-76-60+8
=16
k giúp mình
làm ơn
16 nha bn
k cho mk nhé chúc bn hok tốt