435 - 167 - 89 - 435 - 89
(-67) +125 + (-33) + 75
bài 1 tính
a) 1984 + (-47) - (-254) + (-253) + (-1584)
b) - 2021 + [ 21 - ( 75 -2021)
c) -(- 435 + 167 + 89) - ( 435-89)
ai giúp mình với chi tiết nah
435 - 167 - 89 - 435 - 89
\(435-167-89-435-89\\=(435-435)-(167+89+89)\\=-(256+89)\\=-345\)
[ (-59+71)-[(-83)-(-95)]
(435-167-89)-(435-89)
: (-624)-[(376+245)-45]
a: \(\left[\left(-59\right)+71\right]-\left[\left(-83\right)-\left(-95\right)\right]\)
\(=\left[71-59\right]-\left[-83+95\right]\)
=12-12
=0
b: \(\left(435-167-89\right)-\left(435-89\right)\)
\(=435-167-89-435+89\)
\(=\left(435-435\right)+\left(89-89\right)-167\)
=0+0-167
=-167
c: \(\left(-624\right)-\left[\left(376+245\right)-45\right]\)
\(=\left(-624\right)-\left[376+245-45\right]\)
\(=\left(-624\right)-376-200\)
=-1000-200
=-1200
a, 1000 - ( 137 + 572 ) + ( 263 - 291 )
b, ( -1999 ) - ( 234 - 1999 )
c, ( 435 - 167 - 89 ) - ( 435 - 89 )
a, 1000 - ( 137 + 572 ) + ( 263 - 291 )=263
b, ( -1999 ) - ( 234 - 1999 )=-234
c, ( 435 - 167 - 89 ) - ( 435 - 89 )=-167
bo dau ngoac roi tinh
(-7264) + (1543 + 7264)
(435 - 167 - 89) - (435 - 89)
(-7264)+(1543+7264)
=-7264+1543+7264
=(-7264+7264)+1543
=0+1543=1543
(435-167-89)-(435-89)
=435-167-89-435+89
=(435-435)+(-89+89)+(-167)
=0+0+(-167)=-167
(-7264)+(1543+7264)
=(-7264)+1543+7264
=(-7264+7264)+1543
=0+1543
=1542
(435-167-89)-(435-89)
=435-167-89-435+89
=(435-435)+(-89+89)-167
=0+0-167
-167
bài 1 tính
a) 1984 + (-47) - (-254) + (-253) + (-1584)
b) - 2021 + [ 21 - ( 75 -2021)
c) -(- 435 + 167 + 89) - ( 435-89)
2 Tính giá trị của biểu thức
A = -(20 + x ) - ([ 17+ ( - x) tại x = 28
ai giúp mình với ạ nhanh nhanh với nha tks mọi người
TÍNH BẰNG CÁCH HỢP LÍ ☠
a) -3752-( 29-3632)-51
b) 4524-(12-3999)-(4524+3999)
c) (-116+124 )-(215-116+124)
d)(-435+167+89)-(-435+89)
3.tính nhanh
a)(1456+323)-1456
b)(-1999)-(-234-1999)
c)(116+124)+(215-116-124)
d)(435-167-89)-(435-89)
a ) ( 1456 + 323 ) - 1456
= 1456 + 323 - 1456
= ( 1456 - 1456 ) + 323 = 323
b ) ( - 1999 ) - ( - 234 - 1999)
= - 1999 + 234 + 1999
= ( - 1999 + 1999 ) + 234 = 0 + 234 = 234
a ) ( 1456 + 323 ) - 1456
= 1456 + 323 - 1456
= ( 1456 - 1456 ) + 323 = 323
b ) ( - 1999 ) - ( - 234 - 1999)
= - 1999 + 234 + 1999
= ( - 1999 + 1999 ) + 234 = 0 + 234 = 234
P/s tham khảo nha
a ( - 59 + 71 - { - 83 - ( 95 )}
b - 257 - {( - 257 + 156 ) - 56 }
c ( 435 - 167 ) - 89 ( 435 - 89 )
d -329 + ( 15 - 101 ) - ( 25 - 440 )
e ( 116 + 124 ) + ( 215 - 116 - 124 )
f 4524 - ( 864 - 999 ) - ( 36 - 999 )
a: \(-59+71-\left\{-83-\left(95\right)\right\}\)
\(=71-59+81+95\)
\(=12+81+95\)
\(=93+95=188\)
b: \(-257-\left\{\left(-257+156\right)-56\right\}\)
\(=-257-\left(-257+156-56\right)\)
\(=-257-\left(-257+100\right)\)
\(=-257+257-100=-100\)
c: Sửa đề:\(\left(435-167\right)-89-\left(435-89\right)\)
\(=435-167-89-435+89\)
=\(\left(435-435\right)+\left(-89+89\right)-167\)
=0+0-167
=-167
d: \(-329+\left(15-101\right)-\left(25-440\right)\)
\(=-329+15-101-25+440\)
\(=\left(440-329-101\right)+\left(15-25\right)\)
=10-10
=0
e: \(\left(116+124\right)+\left(215-116-124\right)\)
\(=116+124+215-116-124\)
\(=\left(116-116\right)+\left(124-124\right)+215\)
=0+0+215
=215
f: \(4524-\left(864-999\right)-\left(36-999\right)\)
\(=4524-864+999-36+999\)
\(=4524-\left(864+36\right)+999\cdot2\)
\(=4524-900+1998=5622\)