bài 1:
a) 25 - 18 + ( -43 )
b) (-34) + 11 + |-34|+ (-11)+105
c) 64 + 125 x 147 -47 x 125
d ) 360 : 12 x 2 + [ (11 - 4)3 -343 ] x 20172018
giup mk nha mk tick cho
bài 1:
a) 25 - 18 + ( -43 )
b) (-34) + 11 + |-34|+ (-11)+105
c) 64 + 125 x 147 -47 x 125
d ) 360 : 12 x 2 + [ (11 - 4)3 -343 ] x 20172018
giup mk nha mk tick cho
a: =17-43=-26
b: =-34+34+11-11+105=105
c: \(=64+125\cdot100=12564\)
d: \(=60+\left[7^3-343\right]\cdot2017^{2018}=60\)
Tính:
a.25-(-18)+(-43) b.(-34)+11+|-34|+105
c.64+125+147-47.125
d.360:12.2+[(11-4)3_343].2020
NHANH NHẤT 3 TICK, NHANH THỨ 2 CHO 2 TICK CÒN LẠI 1 TICK
THANKS MỌI NGƯỜI NHIỀU
\(a,25-(-18)+(-43)\)
=\(25+18+(-43)\)
=\(43+(-43)\)
=\(0\)
\(b,(-34)+11+\left|-34\right|+105\)
=\((-34)+11+34+105\)
=\([(-34)+34]+11+105\)
=\(0+11+105\)
=\(116\)
\(c,64+105+147-47.125\)
=\(64+125+(147-47).125\)
=\(64+125+100.125\)
=\(64+125+12500\)
=\(189+12500\)
=\(12689\)
\(d,360\div12.2+[(11-4)^3-343].2020\)
=\(360\div12.2+(7^3-343).2020\)
=\(360\div12.2+0.2020\)
=\(30.2+0\)
=\(60\)
Tìm x:
a)(43-121+18)-(x-49-11)=37-(51-28)
b)113-(47+33-20)=(31-25)-(x+5)
( câu hỏi của BGS)
ai làm đc mk tick 2 cái nha
a, 43-121+18-x+49+11 = 37-51+28
=> -x= 14
=> x= -14 Vậy x=-14
b, 113-47-33+20=31-25-x+5
=> 53= 11-x
=>x=11-53=-42. Vậy x= -42
giải
a) ( 43-121+18) - ( X-49 -11)= 37- (51-28)
-60 - X + 60 = 37 - 23
-X = 14 => X= -14
b) 113-(47+33-20)=(31-25)-(X+5)
113 - 60 = 9 - X - 5
53 = 4 - X
53 - 4 = - X
49 = -X => X= -49
a,<-34>+11+|-34|+<11>+105;b,64+125.147-47.125;c,360 :12.2+[(11-4)ngux-343].2017ngũ 2018
Tính nhẩm
46 x 99 34 x 11 25 x 12 15 x 4 45 x 6 13 x 99 16 x 19 35 x 98
125 x 16 47 x 101
\(46\cdot99\)
\(=46\cdot\left(100-1\right)\)
\(=46\cdot100-46\)
\(=4600-46\)
\(=4554\)
___________
\(34\cdot11\)
\(=34\cdot\left(10+1\right)\)
\(=34\cdot10+34\)
\(=340+34\)
\(=374\)
___________
\(25\cdot12\)
\(=5\cdot5\cdot12\)
\(=5\cdot60\)
\(=300\)
__________
\(15\cdot4\)
\(=15\cdot2\cdot2\)
\(=30\cdot2\)
\(=60\)
____________
\(45\cdot6\)
\(=45\cdot2\cdot3\)
\(=90\cdot3\)
\(=2700\)
________
\(13\cdot99\)
\(=13\cdot\left(100-1\right)\)
\(=13\cdot100-13\)
\(=1300-13\)
\(=1287\)
______________
\(16\cdot19\)
\(=16\cdot\left(20-1\right)\)
\(=16\cdot20-16\)
\(=320-16\)
\(=304\)
_____________
\(35\cdot98\)
\(=35\cdot\left(100-2\right)\)
\(=35\cdot100-35\cdot2\)
\(=3500-70\)
\(=3430\)
____________
\(125\cdot16\)
\(=125\cdot8\cdot2\)
\(=1000\cdot2\)
\(=2000\)
___________
\(47\cdot101\)
\(=47\cdot\left(100+1\right)\)
\(=47\cdot100+47\)
\(=4700+47\)
\(=4747\)
46 x 99 =4554 , 34 x 11 = 374 , 25 x 12 =- 300 , 15 x 4 = 60 , 45 x 6 = 270 , 13 x 99 = 1287 , 16 x 19 = 304
35 x 98 = 3430 , 125 x 16 = 2000 , 47 x 101 = 4747
Bài 4 : Tính nhanh :
a, 15 x 64 + 25 x 100 + 36 x 15 + 60 x 100
b, 47^2 + 48^2 -25 + 94 x 48
c, 9^3 - 9^2 x ( -1) - 9 x 11 + ( -1) x 11
d,2016 x 2018 - 2017^2
Giúp mk vs ạ mk đang cần gấp
Bài 4 : Tính nhanh :
a, 15. 64 + 25. 100 + 36. 15 + 60. 100
= (15 . 64 + 36. 15) + (25. 100 + 60. 100)
= 15.(64 + 36) + 100.(25 + 60)
= 15. 100 + 100. 85
= 100.(15 + 85)
= 100. 100
= 10000
b, 472 + 482 - 25 + 94. 48
= 472 + 2.47. 48 + 482 - 25
= (47 + 48)2 - 52
= (47 + 48 - 5)(47 + 48 + 5)
= (48 + 22)(48 + 52)
= 90. 100
= 9000
c, 93 - 92. ( -1) - 9. 11 + ( -1). 11
= 93 + 92 + 11(- 9 - 1)
= 92.(9 + 1) + 11. (-10)
= 81. 10 - 110
= 810 - 110
= 700
d,2016. 2018 - 20172
= (2017 - 1)(2017 + 1) - 20172
= 20172 - 1 - 20172
= -1
#Học tốt!
Tìm x biết :
25 - ( 11 + x ) = x - ( 34 - 18)
Giúp mk nha mọi người
25-(11+x)=x-(34-18)
25-11-x=x-34+18
-x-x=-34+18-25+11
-2x=-30
x=15
Vậy x=15
Bài 1.Thực hiện phép tính:
a) 25. 12 b) 34. 11 c) 47. 101 f) 4. 36. 25. 50
d) 5. 125. 2. 41. 8 e) 25. 7. 10. 4
a) \(=300\)
b) \(=374\)
c) \(=4747\)
d) \(=180000\)
tìm x biết:
a, (11/12+11/12.23+11/23.24+...+11/89.100)+x=2/3
b, (2/11.13+2/13.15)+...+2/19.21)-x+221/231=4/3
Giúp mk nha ai giải đc mk tick cho nhé!