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Ta có: ( 9x8-12-5x12) x (1+2+3+4+5)
=( 72-12-60) x ( 1+2+3+4+5)
=(60-60) x (1+2+3+4+5)
=0 x (1+2+3+4+5)
=0
Mọi người tk cho mình nha. Mình cảm ơn trước vậy ^.<
(9 x 8 - 12 - 5 x 12) x (1 + 2 + 3 + 4 + 5)
= (72 - 12 - 60) x (1 + 2 + 3 + 4 + 5)
= ( 60 - 60) x (1 + 2 + 3 + 4 + 5)
= 0 x (1 + 2 + 3 + 4 + 5)
= 0
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\(9\cdot8+109\cdot65-87\cdot23+12\cdot12-33\cdot6\)
\(=72+7084-2001+144-198\)
\(=7156-2001+144-198\)
\(=5155+144-198\)
\(=5299-198\)
\(=5101\)
= 72 + 7084 - 2001 + 144 - 198
= 7156 - 2001 + 144 - 198
= 5155 + 144 - 198
= 5299 - 198
= 5101
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\(100-10+9\times8:5\times10-8\)
\(=90+9\times\dfrac{8}{5}\times10-8\)
\(=82+\dfrac{9\times8\times10}{5}\)
\(=82+9\times8\times2\)
\(=82+144\)
\(=226\)
100- 10+ 9x8:5x 10- 8
=100- 10+ 72: 5x10-8
=100- 10+ 14,4x10 -8
= 100-10 + 144 -8
=90 + 144 -8
= 234 - 8
=226
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Tham Khảo :
= 32 x 8 + 9 x 8+9 x 8
= 8 x (32 + 9 + 9)= 8 x 50= 400