a) 180

b) 90

c)  2887

d) 51

k nhá

d)  |31-17| - |15-52|

= |14| - |-37|

= 14 - 37

= -23

b ) 136 -(-7) +6- 23 -36

= 136 + 7 + 6 - 23 - 36

= 143 + 6 - 23 - 36

= 149 - 23 - 36

= 90

136*34+36*136+30*136  

=136*(34+36+30)

=136*100

=13600

a) \(56^2+44^2+2.56.44=56^2+2.56.44+44^2=\left(56+44\right)^2=100^2=10000\)

b) \(36^2+64^2+72.64=36^2+2.36.64+64^2=\left(36+64\right)^2=100^2=10000\)

c) \(136^2+36^2-72.136=136^2-2.36.136+36^2=\left(136-36\right)^2=100^2=10000\)

a) $56^2+44^2+2.56.44=56^2+2.56.44+44^2=\left(56+44\right)^2=100^2=10000$562+442+2.56.44=562+2.56.44+442=(56+44)2=1002=10000

b) $36^2+64^2+72.64=36^2+2.36.64+64^2=\left(36+64\right)^2=100^2=10000$362+642+72.64=362+2.36.64+642=(36+64)2=1002=10000

c) $136^2+36^2-72.136=136^2-2.36.136+36^2=\left(136-36\right)^2=100^2=10000$

`123 xx 137 - 123 xx 36 - 123`

`= 123 xx 137-123xx36-123xx1`

`=123xx(137-36-1)`

`=123xx100`

`=12300`

$#flo2k9$

`123 xx 137 - 123 xx 36 - 123`

= `123 xx ( 137 - 36 - 1 )`

= `123 xx 100`

= `12300`

\(123\times137-123\times36-123=123\times\left(137-36-1\right)=123\times100=12300\)

a,-136+123+(-264)+(-83)+240

= (123 - 83) - (136 + 264) + 240

= -40 - 400 + 240

= (240 - 40) - 400

= 200 - 400 = -200

b,-596+2001+1999+(-404)+189

= (2001 + 1999) - (596 + 404) + 189

= 4000 - 1000 + 189

= 3000 + 189

= 3189

a) 98 + 3 + 97 +2

= (98 +2) + ( 97 + 3)

= 100 + 100 = 200

56 + 399 + 1 + 4

= (56 + 4) +( 399 + 1)

= 60 + 400 = 460

b) 364 + 136 + 219 + 181

= (364 + 136) + (219 + 181

= 500 + 400 = 900

178 277 + 123 + 422

= (178 + 422) + (277 + 123)

= 600 + 400 = 1000

tính bang cach thuyen tien nhat;236+400+364=.......

136 . 36 + 18 . 272

= 272.18 + 18.272

= 272.(18 + 18)

= 272 x 36

 = 9792

\(136.36+18.272\)

\(=136.36+18.2.136\)

\(=136.36+36.136\)

\(=136.\left(36+36\right)\)

\(=136.72\)

\(=9792\)

Lớp 5 mà đã dùng dấu . là nhân sao

136.36+18.272

=272.18+18.272

=272.(18+18)

=272x36

=9792

nhớ tích cho mk nha chúc bn hk tốt