\(5\cdot7\cdot12=420\)
\(6\cdot9\cdot15=810\)
\(5\cdot9\cdot14=630\)
\(7\cdot11\cdot18=1386\)
5*7*12=420
6*9*15=810
5**9*14=630
7*11*18=1386
5 x 7 x 12 = 420
6 x 9 x 15 = 810
5 x 9 x 14 = 630
7 x 11 x 18 = 1386
Thấy Được Thì Tk Cho Mình Nhé!
5 x 7 x 12 = 420
6 x 9 x 15 = 810
7 x 11 x 18 = 1386
k mk nhé
5 x 7 x 12 = 420
6 x 9 x 15 = 810
5 x 9 x 14 = 630
7 x 11 x 18 = 1386
\(5x7x12=60x7=420\)
\(6x9x15=90x9=810\)
\(5x9x14=70x9=630\)
\(7x11x18=198x7=1386\)
Chúc bạn học tốt nha!
a) \(5\times7\times12\)
\(=\left(5\times12\right)\times7\)
\(=100\times7\)
\(=700\)
b) \(6\times9\times15\)
\(=\left(2\times3\right)\times9\times15\)
\(=\left(9\times3\right)\times\left(15\times2\right)\)
\(=27\times30\)
\(=810\)
c) \(5\times9\times14\)
\(=9\times\left(5\times14\right)\)
\(=9\times70\)
\(=630\)
d) \(7\times11\times18\)
\(=77\times18\)
\(=1386\)
5 x 7 x 12
= ( 5 x 12 ) x 7
= 60 x 7
= 420
6 x 9 x 15
= ( 6 x 15 ) x 9
= 90 x 9
= 810
5 x 9 x 14
= ( 5 x 14 ) x 9
= 70 x 9
= 630
7 x 11 x 18
= 77 x 18
= 1386
5 x 7 x 12
= ( 5 x 12 ) x 7
= 60 x 7
= 420
6 x 9 x15
=( 6 x 15 ) x 9
= 90 x 9
= 810
5 x 9 x14
= ( 5 x 14 ) x 9
= 60 x 9
= 540
7 x 11 x 18
= ( 7 x 18) x 11
= 126 x 11
= 1386
HT
