1994 . 867 + 1995 . 133
=1994.867+ (1994+1).133
=1994.867+1994.133+1994
=1994.(867+133)+1994
=1994.1000+1994
=1994000+1994
=1995994
k mình nha!
đáp án là:
1994 x 867 + 1995 x 133
= 1994 x 867 + (1994 + 1) x 133
= 1994 x 867 + 1994 x 133 + 133
= 1994 x (867 + 133) + 133
= 1994 x 1000 + 133
= 1994000 + 133
= 1994133