12 .2 + 12.8 + 12.52 + 12.38
=12. ( 2 + 8 + 52 + 38)
=12.100
=1200
12.2 + 12.8 + 12.52 + 12.38
= 12 ( 2 + 8 + 52 + 38 )
= 12 . 100
= 1200
12 x 2 + 12 x 8 +12 x 52 +12 x 38 =12 x ( 2 + 8 + 52 + 38 ) =12 x 100 = 1200
\(12.2+12.8+12.52+12.38\)
\(=12.\left(2+8\right)+12.\left(52+38\right)\)
\(=12.10+12.90\)
\(=12.\left(10+90\right)\)
\(=12.100\)
\(=1200\)
12 . 2 + 12 . 8 + 12 . 52 + 12 . 38
= 12 . ( 2 + 8 + 52 + 38 )
= 12 . 100
= 1200
mik giảilun nha
ko ghi lại đề bài
= 12 x ( 2 + 8 + 52 + 38 )
= 12 x 100
= 1200
k mik nha