Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
=(1+...2005)x(125x1001x127-127x1001x125)
=(1+...2005)x0
=0
Chúc bạn học giỏi
a ) 11,3 + 6,9 + 8,7,+ 13,1
= ( 11,3 + 8,7) + (6,9 + 13,1)
= 20 + 20
= 40
b) ( 1 + 3 + 5 + ...+ 2007 + 2009 + 2011 ) ( 125125 x127 - 127127 x 125)
= ( 1 + 3 + 5 + ... + 2007 + 2009 + 2011 ) ( 15890875 - 15890875 )
= ( 1 + 3 + 5 + ... + 2007 + 2009 + 2011 ) x 0
= 0
''a ) 11,3 + 6,9 + 8,7,+ 13,1 = ( 11,3 + 8,7) + (6,9 + 13,1) = 20 + 20 = 40 b) ( 1 + 3 + 5 + ...+ 2007 + 2009 + 2011 ) ( 125125 x127 - 127127 x 125) = ( 1 + 3 + 5 + ... + 2007 + 2009 + 2011 ) ( 15890875 - 15890875 ) = ( 1 + 3 + 5 + ... + 2007 + 2009 + 2011 ) x 0 = 0''
Bài 1:
\(a,=\left(156+44\right)+2017=200+2017=2217\\ b,=86\left(124-24\right)-600=86\cdot100-600=8000\\ d,=700:\left[25\left(394-498\right)\right]=700:\left[25\cdot\left(-104\right)\right]=700:\left(-2600\right)=-\dfrac{7}{26}\)
Bài 2:
\(a,\Rightarrow x=164+14=178\\ b,\Rightarrow5\left(75-x\right)=225\\ \Rightarrow75-x=45\\ \Rightarrow x=30\\ c,\Rightarrow2x-7=5\Rightarrow x=6\)
`-127 +208 -73 +92`
`= ( -127 -73) + (208+92)`
`=-200 +300`
`= 100`
__
`2353 - ( 473 + 2153) + (-55+373)`
`= 2353 - 473 -2153 -55+373`
`= ( 2353 - 2153) + (-473 + 373) -55`
`=200 -100-55`
`=100-55`
`=45`
−127+208−73+92
=(−127−73)+(208+92)=(−127−73)+(208+92)
=−200+300=−200+300
=100=100
__
2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373)
=2353−473−2153−55+373=2353−473−2153−55+373
=(2353−2153)+(−473+373)−55=(2353−2153)+(−473+373)−55
=200−100−55=200−100−55
=100−55=100−55
=45=45
a) −127+208−73+92−127+208−73+92
= (-127 -73)+ ( 208 + 92)
= -200+300
=100
b) 2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373)
= 2353 - 473- 2153 - 55 + 373
= ( 2353- 2153)- (473- 373) - 55
=200- 100- 55
=100- 55
=45
a) −127+208−73+92−127+208−73+92
=(−127−73)+(208+92)=(−127−73)+(208+92)
=−200+300=100=−200+300=100.
b) 2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373)
=2353−473−2153−55+373=2353−473−2153−55+373
=(2353−2153)+(373−473)−55=(2353−2153)+(373−473)−55
=200−100−55=200−100−55
=45=45.
a) −127+208−73+92
=(−127−73)+(208+92)=(−127−73)+(208+92)
=−200+300=−200+300
=100=100
2353−(473+2153)+(−55+373)b) 2353−(473+2153)+(−55+373)
=2353−473−2153−55+373=2353−473−2153−55+373
=(2353−2153)+(−473+373)−55=(2353−2153)+(−473+373)−55
=200−100−55=200−100−55
=100−55=100−55
=45=45
−127+208−73+92
=(−127−73)+(208+92)=(−127−73)+(208+92)
=−200+300=−200+300
=100=100
__
2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373)
=2353−473−2153−55+373=2353−473−2153−55+373
=(2353−2153)+(−473+373)−55=(2353−2153)+(−473+373)−55
=200−100−55=200−100−55
=100−55=100−55
=45=45
a) −127+208−73+92−127+208−73+92
= (-127 - 73) + (208 + 92)
= -200 + 300
= 100
b) 2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373)
= 2353 - 473 - 2153 - 55 + 373
= (2353 - 2153) + (-473 + 373)
= 200 + (-100)
= 100
a) −127+208−73+92−127+208−73+92
=[(-127)-73]+(208+92)
=200+300
=500
b) 2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373).
=2353-473+2153-55+373
=(2353-2153)+(473-373)+55
=200+100+55
=300+55
=355
−127+20
a) −127+208−73+92
=(−127−73)+(208+92)=(−127−73)+(208+92)
=−200+300=−200+300
=100=100
2353−(473+2153)+(−55+373)b)2353−(473+2153)+(−55+373)
=2353−473−2153−55+373=2353−473−2153−55+373
=(2353−2153)+(−473+373)−55=(2353−2153)+(−473+373)−55
=200−100−55=200−100−55
=100−55=100−55
=45=45
a)-127 +208- 73+92
=-(127+73)+(208+92)
= - 200 +300
=100
2353−(473+2153)+(−55+373)
=2353 -473 -2153-55+373
= (2353 -2153 ) - ( 473 - 373) - 55
= 200 - 100 -55
= 45
a) −127 + 208 − 73 + 92
= (-127 - 73) + (208 + 92)
= (-200) + 300
= 100
b) 2353 - (473 + 2153) + (-55 + 373)
= 2353 - 2626 + 318
= 45
−127+208−73+92
=(−127−73)+(208+92)=(−127−73)+(208+92)
=−200+300=−200+300
=100=100
2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373)
=2353−473−2153−55+373=2353−473−2153−55+373
=(2353−2153)+(−473+373)−55=(2353−2153)+(−473+373)−55
=200−100−55=200−100−55
=100−55=100−55
=45=45
a -127 + 208 - 73 + 92
= [(-127 -73] + ( 208 + 92 )
= -200 + 300
= 100
b 2353−(473+2153)+(−55+373).
= 2353 - 473 -2153 - 55 + 373
= ( 2353 - 2153 ) + [( - 473 ) + 373 ] - 55
= 200 + ( -100) - 55
= 100 - 55
= 45
a)
−127+208−73+92
=(−127−73)+(208+92)=(−127−73)+(208+92)
=−200+300=−200+300
=100=100
b)2353−(473+2153)+(−55+373).
=
=2353−473−2153−55+373
=(2353−2153)+(−473+373)−55=(2353−2153)+(−473+373)−55
=200−100−55=200−100−55
=100−55=100−55
=45=45
a) −127+208−73+92
=81-73+92
=8+92
=100
b) 2353−(473+2153)+(−55+373).
=2353-473-2153+(-55)+373
=(2353-2153)-(473-373)+(-55)
=200-100+(-55)
=100+(-55)
=45
a) −127+208−73+92−127+208−73+92
=(−127−73)+(208+92)=(−127−73)+(208+92)
=−200+300=100=−200+300=100.
b) 2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373)
=2353−473−2153−55+373=2353−473−2153−55+373
=(2353−2153)+(373−473)−55=(2353−2153)+(373−473)−55
=200−100−55=200−100−55
=45=45.
a) −127+208−73+92−127+208−73+92
=(−127−73)+(208+92)=(−127−73)+(208+92)
=−200+300=100=−200+300=100.
b) 2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373)
=2353−473−2153−55+373=2353−473−2153−55+373
=(2353−2153)+(373−473)−55=(2353−2153)+(373−473)−55
=200−100−55=200−100−55
=45=45.
a) −127+208−73+92−127+208−73+92
=(−127−73)+(208+92)=(−127−73)+(208+92)
=−200+300=100=−200+300=100.
b) 2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373)
=2353−473−2153−55+373=2353−473−2153−55+373
=(2353−2153)+(373−473)−55=(2353−2153)+(373−473)−55
=200−100−55=200−100−55
=45=45.
a) −127+208−73+92−127+208−73+92
=(−127−73)+(208+92)=(−127−73)+(208+92)
=−200+300=100=−200+300=100.
b) 2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373)
=2353−473−2153−55+373=2353−473−2153−55+373
=(2353−2153)+(373−473)−55=(2353−2153)+(373−473)−55
=200−100−55=200−100−55
=45=45.
a) −127+208−73+92−127+208−73+92
=(−127−73)+(208+92)=(−127−73)+(208+92)
=−200+300=100=−200+300=100.
b) 2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373)
=2353−473−2153−55+373=2353−473−2153−55+373
=(2353−2153)+(373−473)−55=(2353−2153)+(373−473)−55
=200−100−55=200−100−55
=45=45.
a) −127+208−73+92−127+208−73+92
=(−127−73)+(208+92)=(−127−73)+(208+92)
=−200+300=100=−200+300=100.
b) 2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373)
=2353−473−2153−55+373=2353−473−2153−55+373
=(2353−2153)+(373−473)−55=(2353−2153)+(373−473)−55
=200−100−55=200−100−55
=45=45.
a) −127+208−73+92−127+208−73+92
=(−127−73)+(208+92)=(−127−73)+(208+92)
=−200+300=100=−200+300=100.
b) 2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373)
=2353−473−2153−55+373=2353−473−2153−55+373
=(2353−2153)+(373−473)−55=(2353−2153)+(373−473)−55
=200−100−55=200−100−55
=45=45.
a)-127+208-73+92
=(-127-73)+(208+92)
=-200+300
=100
b)2353-(473+2153)+(−55+373).
=2353−473−2153−55+373
=(2353−2153)+(373−473)−55=(2353−2153)+(373−473)−55
=200−100−55=200−100−55
=45=45.
a) −127+208−73+92−127+208−73+92
=(−127−73)+(208+92)=(−127−73)+(208+92)
=−200+300=100=−200+300
=100.
b) 2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373)
=2353−473−2153−55+373=2353−473−2153−55+373
=(2353−2153)+(373−473)−55=(2353−2153)+(373−473)−55
=200−100−55=200−100−55
=45=45.
−127+208−73+92
=(−127−73)+(208+92)=(−127−73)+(208+92)
=−200+300=−200+300
=100=100
__
2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373)
=2353−473−2153−55+373=2353−473−2153−55+373
=(2353−2153)+(−473+373)−55=(2353−2153)+(−473+373)−55
=200−100−55=200−100−55
=100−55=100−55
=45=45
a) −127+208−73+92−127+208−73+92
= -(127+73)+(208+92)
=-200+300
=100
b) 2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373)
=2353-473-2153-55+373
=(2353-2153)-(473-373)-55
=200-100-55
=45
a) −127+208−73+92−127+208−73+92
= ( -127 - 73 ) + ( 208 +92 )
= -200 + 300
= 100.
b) 2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373)
= 2 353 - ( 473 - 2 153 ) + ( -55 + 373 )
= ( 2 353 - 2 153 ) - ( 473 - 373 ) + ( -55 )
= 200 - 100 + (-55)
= 100 + (-55)
= 45
a) −127+208−73+92−127+208−73+92
= -127 - 73 + 208 + 92
= -200 + 300
= 100
b) 2353−(473+2153)+(−55+373)2353−(473+2153)+(−55+373)
= 2353−(473+2153)+(−55+373)2 353 − (473 - 2 153)+ ( −55 + 373 )
= 2 353 - 2 153 - ( 473 + 373 ) + (-55)
= 200 - 100 + ( -55)
= 100 + (-55)
= 45
−127+208−73+92
=(−127−73)+(208+92)
=−200+300=−200+300
=100=100
2353−(473+2153)+(−55+373)
=2353−473−2153−55+373=2353−473−2153−55+373
=(2353−2153)+(−473+373)−55=(2353−2153)+(−473+373)−55
=200−100−55=200−100−55
=100−55=100−55
=45=45
a) −127+208−73+92−127 + 208 − 73 + 92
= 81 - 165
= 81 + (-165)
= 84
b) 2353−(473+2153)+(−55+373)2353 − (473 + 2153) + ( −55 + 373 ).
= 2353 - 2626 + 318
= 2353 + ( - 2626) + 318
= ( - 273 ) + 318
= 45