1.TÍNH NHANH
A, (476-324) - (124+524)
B, -(127-2013)+(-1013-372)
1.TÍNH NHANH
A, (476-324) - (124+524)
B, -(127-2013)+(-1013-372)
a: =476-324-124-524
=-172-324
=-496
b:=-127+2013-1013-372
=1000-449=501
1.TÍNH NHANH
A, (476-324) - (124+524)
\(\left(476-324\right)-\left(124+524\right)\)
\(=476-324-124-524\)
\(=-496\)
A= ( 476-324) - ( 124+524)
= 152 - 648
= -496
Tính nhanh
a ) − 2 15 + 1 14 + 2 15 b ) − 7 24 + 1 24 + 35 140 c ) − 3 9 + − 6 9 + 1 ; d ) − 7 129 + 5 24 + − 5 24
a 524-[(476 + 524 )-76]
b ( 67-5759)+5759
c 4.( 2020+2019)+ 4 .( -2019)
GIÚP MIK GẤP VỚI
\(a,524-\left[\left(476+524\right)-76\right]\)
\(=524-1000+76\)
\(=600-1000\)
\(=-400\)
\(b,\left(67-5759\right)+5759\)
\(=67-5759+5759\)
\(=67\)
\(c,4.\left(2020+2019\right)+4.\left(-2019\right)\)
\(=4.\left(2020+2019-2019\right)\)
\(=4.2020\)
\(=8080\)
tính nhanh
a) (1- 1/ 10) nhân ( 1- 1/12 ) nhân ( 1- 1/13 ) nhân ( 1- 1/14 ) nhân (1- 1/15 )
b) 2013 nhân 2012 trừ 2 / 2011+ 2011 nhân 2013
\(a,\left(1-\dfrac{1}{10}\right)\times\left(1-\dfrac{1}{11}\right)\times\left(1-\dfrac{1}{12}\right)\times\left(1-\dfrac{1}{13}\right)\times\left(1-\dfrac{1}{14}\right)\times\left(1-\dfrac{1}{15}\right)=\dfrac{9}{10}\times\dfrac{10}{11}\times\dfrac{11}{12}\times\dfrac{12}{13}\times\dfrac{13}{14}\times\dfrac{14}{15}=\dfrac{9}{15}=\dfrac{3}{5}\)
\(b,\dfrac{2013\times2012-2}{2011+2011\times2013}=\dfrac{\left(2014-1\right)\times2012-2}{2011\times\left(2013+1\right)}=\dfrac{2014\times2012-2012-2}{2011\times2014}=\dfrac{2014\times2012-2014}{2011\times2014}=\dfrac{2014\times\left(2012-1\right)}{2011\times2014}=\dfrac{2011\times2014}{2011\times2014}=1\)
Tính nhanh
a) -677. 54 + 54. (-125) + 2. 54
b) -(324 - 267 + 252) + (133 - 76)
#\(N\)
`a, -677*54+54.(-125)+2.54`
`=54.(-677+-125+2)`
`=54.(-800)`
`=-43200`
`b, -(324-267+252)+(133-76)`
`=-324+267-252+133-76`
`= (-324+-76)+(133+267)-252`
`=-400+400-252`
`=-252`
a: =54(-677-125+2)
=54*(-800)
=-43200
b: =-324+267-252+133-76
=-400+400-252
=-252
a. -677 . 54 + 54 . ( - 125 ) + 2. 54
= 54 . ( -677 + ( -125 ) + 2 )
= 54 . ( -802 + 2 )
= 54 . ( -800 )
= -43200
b.- (324 - 267 + 252) + (133 - 76)
= 324 - 267 + 252 + 133 -76
= 324 +76 - 267 + 133 -252
= 400 - 400 +252
= -252
a) Tìm các số nguyên x thỏa mãn:
-7 < x < 8
b) Tính nhanh các tổng:
1) 631 + [ 587 - (287+231)]
2) (-524) - [(476+246)-45]
a) -7 < 0,1,2,3,4,5,6,7<8
b)
1) 631 + [ 587 - (287+231)]
= 631 + [ 587 - 518 ]
= 631 + 69
=700
2) (-524) – [(476 + 245) - 45]
= (-524) – 476 – 245 + 45
= (-524) + (– 476) + (– 245) + 45
= (-1000) + (-200)
= -1200.
= 631 + 69
= 700
a) Tìm các số nguyên x thỏa mãn: \(-7< x< 8.\)
\(x=\left\{-6;-5;-4;-3;-2;-1;0;1;2;3;4;5;6;7\right\}.\)
b) Tính nhanh các tổng:
1) \(631+\left[587-\left(287+231\right)\right]=631+587-287-231=\left(631-231\right)+\left(587-287\right)=400+300=700.\)
2) \(\left(-524\right)-\left[\left(476+246\right)-45\right]=\left(-524-246\right)+\left(-476+45\right)=-1201.\)
Tính nhanh :
a) 2012 x 2013 - 1013 x 2013 + 2013 =
2012 x 2013 - 1013 x 2013 + 2013
= 2012 x 2013 - 1013 x 2013 + 2013 x 1
= 2013 x ( 2012 - 1013 + 1 )
= 2013 x 1000
= 2013000
a) 2012x2013-1013x2013+2013
=2013(2012-1013+1)
=2013x1000
=2013000
\(2012x2013-1013x2013+2013\)
\(=2013x\left(2012-1013+1\right)\)
\(=2013x1000\)
\(=2013000\)
Nhớ ấn đúng cho mình nha!
Tính nhanh :
2013 x 2012 - 1013 / 1000 + 2013 x 2011