Question

Answer 1

a)\(257\times432+257\times354+257\times214=257\times\left(432+354+214\right)=257\times1000=257000\)
Mấy phần sau làm tương tự

Answer 2

e)(m:1-mx1):(mx2008+m+2008)
=(m-m):(mx2008+m+2008)
=0:(mx2008+m+2008)=0

Answer 3

b) = 325 x ( 1574 - 325 - 249 )

= 325 x 1000 = 325000

c) =321 x (574 + 425 + 1)

  = 321 x 1000 = 321000

d) = 175 x(1274 - 273 -1)

= 175 x 1000 = 175000