Question

Tính nhanh 36.28 + 36.72 + 23.100 + 21.100

Answer 1

 36.28 + 36.72 + 23.100 + 21.100
= 36 . 100  + 23 . 100 + 21 . 100 
= 80.100
= 8000

Answer 2

=36 . (28+72)+100.(23+21)

=36.100+100.44

=100.(36+44)

=100.80

=8000

Answer 3

= 36 . 100 + 23 . 100 + 21 . 100 

= 80.100

= 8000