Bài này dễ mà em
19 . 64 + 76 . 34
= 19 . 4 . 16 + 76 . 34
= 76 . 16 + 76 . 34
= 76 . ( 16 + 34 )
= 76 . 50
= 3800
19.64+76.34=(19+76).(64+34)
= 95 .100
=9500
19 . 64 + 76 . 34
= (19 . 4) . (64 : 4) + 76 . 34
= 76 . 16 + 76 . 34
= 76 . (16 + 34)
= 76 . 50
= 3800
19.32.2+38.2.34
[19.32].2+38.[2.34]
38.32+38.68
38.[32+68]
38.100=3800
19.64 + 76.34
= 19.64 + 19.4.34
= 19.64 + 19.136
= 19 . ( 64 + 136 )
= 19 . 200
= 3800
19 . 64 + 76 . 34
= 19 . 4 . 16 + 76 . 34
= 76 . 16 + 76 . 34
= 76 . ( 16 + 34 )
= 76 . 50
= 3800