d, 2 . 17 . 12 + 4 . 6 . 12 + 8 . 3 . 62
= 2 . 12 . 17 + 24 . 12 + 24 . 62
= 24 . 17 + 24 . 12 + 24 . 62
= 24 . ( 17 + 12 + 62 )
= 24 . 91
= 2184
2.17.12+4.6.12+8.3.62
=(2.12).17+(4.6).12+(8.3).62
=24.17+24.12+24.62
=24.(17+12+62)
=24.91
=2184
Tính Nhanh
e, 37.24 + 37 . 76 + 63 . 79 + 63 . 21
giúp mình nhé