9 x 9+25 x 9+33 x 18
=9 x 9+25 x 9+33 x 2 x 9
=9 x 9+25 x 9+66 x 9
=(9+25+66) x 9
=100 x 9
=900
9 x 9 + 25 x 9 + 33 x 18 = 9 x 9 + 25 x 9 + 33 x 2 + 18
= 9 x 9 + 25 x 9 + 66 x 9
= (9 + 25 + 66) x 9
= 100 x 9
= 900
9 x 9 + 25 x 9 + 33 x 18
= 9 x 9 + 25 x 9 + 33 x 9 x 2
= 9 x (25 + 33) x 2
= 1044
mk nghĩ zậy!!!
Ta có:
9x9 + 25x9 + 33x18 = 9x(9 + 25 + 33x2)
= 9x100
= 900
9.9 + 25.9 + 33.18
= 9.9 + 25.9 + 33.9.2
= 9.9 + 25.9 + 66.9
= 9.(9+25+66)
= 9.100
= 900
9 x 9 + 25 x 9 + 33 x 18
= 9 x 9 + 25 x 9 + 33 x 18
= ( 9 + 25 + 66 ) x 9
= 100 x 9
= 900
Ta có \(9\times9+25\times9+33\times18=9\times9+25\times9+33\times2\times9\)
\(=9\times9+25\times9+66\times9=9\times\left(9+25+66\right)\)
\(=9\times100=900\)
9 x 9 + 25 x 9 + 33 x 18
= 9 x 9 + 25 x 9 + 33 x 2 x 9
= 9 x 9 + 25 x 9 + 66 x 9
= ( 9 + 25 + 66 ) x 9
= 100 x 9
= 900
9 x 9 + 25 x 9 + 33 x 18
=9 x 9 + 25 x 9 + 33 x 2 x 9
=9 x (9+25+33x2)
=9 x (9+25+66)
=9 x 100 = 900