Question

Tinh nhanh:

25.(32+47)-32.(25+47)

Answer 1

25.(32 + 47) - 32.(25 - 47)

= 25.32 + 25.47 - 32.25 - 32.47

= (25.32 - 32.25) + 25.47 - 32.47

= 0 + 47.(25 - 32)

= 47. (-7)

= -329

Answer 2

25.32+25.47-32.25+32.47

(25-25).32+25.47+32.47

0+25.47+32.47

(25+32).47

Answer 3

25.(32+47)-32.(25+47)

=25.79-32.72

=1975-2304

= -329