4 . 15 . 17 + 5 . 12 . 27 + 6 . 10 . 56
= ( 4 . 15 ) . 17 + ( 5 . 12 ) . 27 + ( 6 . 10 ) . 56
= 60 . 17 + 60 . 27 + 60 . 56
= 60 . ( 17 + 27 + 56 )
= 60 . 100
= 6000
4.15.17 + 5.12.27 + 6.10.56
= (4.15).17 + (5.12).27 + (6.10).56
= 60.17 + 60.27 + 60.56
= 60. (17 + 27 + 56)
= 60. 100
= 6000
Sorry mình viết thiếu số 5 . Đáp án đúng là 15
4.15.17+5.12.27+6.10.56
=4.3.5.17+5.3.4.27+3.2.5.2.56
=4.3.5.17+5.3.4.27+3.5.4.56
=4.[3+3+5+5+27+56+17]
=4.[9+100]
=4.100+4.9
=4000+36
=4036
4.15.17+5.12.27+6.10.56
=(4.15).17+(5.12).27=(6.10).56
=60.17+60.27+60.56
=60.(17+27+56)
=60.100
=6000