(435 x 234 - 89) : (233 x 435 + 346)
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
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
Tinh nhanh
a.(1456+23)-1456
b.(-1999)-(-234-1999)
c.(116+124)+(215-116-124)
d.(435-167-89)-(435-89)
a.(1456+23)-1456
=1456+23-1456
=(1456-1456)+23
=23
b.(-1999)-(-234-1999)
=-1999-(-234)+1999
=(-1999+1999)-(-234)
=-(-234)
=234
c.(116+124)+(215-116-124)
=116+124+215-116-124
=(166-166)+(124-124)+215
=215
d.(435-167-89)-(435-89)
=435-167-89-435+89
=(435-435)-(89-89)-167
=-167
k for more
#hungB
a) = 1456 + 23 - 1456
= ( 1456 - 1456 ) + 23
= 0 + 23
= 23
b) = ( -1999 ) + 234 + 1999
= ( -1999 + 1999 ) + 234
= 0 + 234
= 234
c) = 116 + 124 + 215 - 116 - 124
= ( 116 - 116 ) + ( 124 - 124 ) + 215
= 0 + 0 + 215
= 215
d) = 435 - 167 - 89 - 435 + 89
= ( 435 - 435 ) + ( -89 + 89 ) - 167
= 0 + 0 - 167
= -167
435 - 167 - 89 - 435 - 89
\(435-167-89-435-89\\=(435-435)-(167+89+89)\\=-(256+89)\\=-345\)
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
435 - 167 - 89 - 435 - 89
(-67) +125 + (-33) + 75
435 − 167 − 89 − 435 − 89
=(435 − 435) − (167 + 89 + 89)
= −(256 + 89)
= -345
----------------------------------
(-67) + 125 + (-33) + 75
= [(-67) + (-33)] + (125 + 75)
= -100 + 200
= 100
Điền dấu >, <, =
364 234 □ 298 746
813 815 □ 682 686
435 872 □ 510 231
327 486 □ 327 486
556 329 □ 556 400
89 880 □ 80 888
Hướng dẫn giải:
364 234 298 746
813 815 682 686
435 872 510 231
327 486 327 486
556 329 556 400
89 880 80 888
theo thứ tự nha
>
>
<
=
<
>
[ (-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
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