-25 , 72 + 25 .21 - 49 . 25
=25 . -72 + 25 . 21 - 49 . 25
=25 . (-72 + 21 - 49)
=25 . -100
=-2500
k mk nha
\(-25.72+25.21-49.25\\ =25.\left(-72+21-49\right)\\ =25.\left(-100\right)\\ =-2500\)
-25 . 72 + 25 .21 - 49 .25 = 25 . (-72) + 25 .21 - 49 .25
= 25 ( -72 + 21 -49 ) = 25 . (-100) = -2500
Tinh nhanh : -25 x 72 + 25 . 21 - 49 x25
-25 x 72 + 25 .21 - 49 x 25
=25 x -72 + 25 . 21 - 49 . 25
=25 x (-72 + 21 - 49)
=25 x -100
=-2500
chơi bang bang thì tích nha !
-25 x 72 + 25 . 21 - 49 x25
-25 x 72 + 25 .21 - 49 x 25
=25 x -72 + 25 . 21 - 49 . 25
=25 x (-72 + 21 - 49)
=25 x -100
=-2500
-25 x 72 + 25 . 21 - 49 x25
-25 x 72 + 25 .21 - 49 x 25
=25 x -72 + 25 . 21 - 49 . 25
=25 x (-72 + 21 - 49)
=25 x -100
=-2500
