Question

[phungvantien]

Tính Nhanh 

a, 467+238+533+762+3456

b, 1357+2468+8642+7531

Answer 1

[Nguyễn Thị Diệu Mai]

a, 467 + 238 + 533 + 762 + 3456

= ( 467 + 533 ) + ( 238 + 762 ) + 3456

=      1000       +       1000       + 3456

=                 2000                   + 3456

=                                 5456

b, 1357 + 2468 + 8642 + 7513

= ( 1357 + 7513 ) + ( 2468 + 8642 )

=         8870        +       11110

=                   19980