9x7
9x7=...
9x1+9x7+9x2=?
\(9x1+9x7+9x2\)
\(=9x\left(1+7+2\right)\)
\(=9x10\)
\(=90\)
7/9x7/24+2/9x7/24=
12/9x8/35-3/9x8/35=
17/25x13/19+17/25x6/19=
47/19:15/32-47/19:15/17=
Cách giải nữa nha các bạn!!!!!
9x7=
63:9=
(9x7+8x9-15x9):(1+3+5+7+ ....+17+19)
\(9\times7+8\times9-15\times9.\\ =9\times\left(7+8-15\right)=9\times0=0.\)
\(\Rightarrow\left(9\times7+8\times9-15\times9\right):\left(1+3+5+7+...+17+19\right).\\ =0:\left(1+3+5+7+...+17+19\right).\\ =0.\)
\(=\left(15\cdot9-15\cdot9\right):\left(1+3+...+17+19\right)=0\)
=9×(7+8-15)=9×0=0
=0:(1+3+5+7+...+17+19)
=0
9x9
9x8
9x7
3+4/9x7/25x27/12x3 4/7-7/25
ai làm đúng mình sẽ pick cho người đấy
9x9=
9x7=
9x4=
8x3=
9 x 9 = 81
9 x 7 = 63
9 x 4 = 36
8 x 3 = 24
nhớ k nha
9x 9 = 81
9 x 7 = 63
9 x 4 = 36
8 x 3 = 24
Tk + kb vs mk nha! thanks
2\3x7\15-2\3x5\27tren-4\9x7\15+4\9x5\27