Question

 

Tính nhanh :

a) ( 1267 - 196 ) - ( 267 + 304 )

b) ( 3965 - 2378 ) - ( 437 - 1378 ) - 528

Answer 1

a) ( 1267-196 ) - ( 267 + 304 )

= ( 1267 - 267 ) - ( 196 + 304 )

= 1000 - 400

= 600

b ) ( 3965 - 2378 ) - ( 437-1378 ) - 528

=

Answer 2

a, (1267-196)-(267+304)

=(1267-267)-(196+304)

=1000-500

=500

b; (3965-2378)-(437-1378)-528

=(3965-528-437)-(2378-1378)

=3000-1000

=2000