510+427+480+425+573+575
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=3381x3+6x573x4
=10143+6x573x4
=10143+3432x4
=10143+13728
=23871
Lưu ý:Phải làm nhân chia trước,cộng trừ sau.
a) \(-215+\left(-427\right)-\left(-515\right)-573\)
\(=-215+\left(-427\right)+515-573\)
\(=\left(-215+515\right)+\left(-427-573\right)\)
\(=-300+-1000=-1300\)
b) \(-68+68.\left(-76\right)+68.\left(-23\right)\)
\(=68.\left(-1\right)+68.\left(-76\right)+68.\left(-23\right)\)
\(=68.\left(-1+-76+-23\right)\)
\(=68.-10=-6800\)
= 24 x 427 + 24 x 573
= 24 x (427 + 573)
= 24 x 1000
= 24000
8 x 427 x 3 + 6 x 573 x 4
= 8 x 3 x 427 + 6 x 4 x 573
= 24 x 427 + 24 x 573
= 24 x (427 + 573)
= 24 x 1000
= 24000
2008 x 867 + 2009 x 133
= 2008 x 867 + 2008 x 133 + 133
= 2008 x (867 + 133) + 133
= 2008 x 1000 + 133
= 2008133
8 x 427 x 3 + 6 x 573 x4=
8x3x427+6x4x573=24x427+24x573=24x(427+573)=24x1000=24000
= 2400 nhé
\(a,8\times427\times3+6\times573\times4\)
\(=24\times427+24\times573\)
\(=24\times\left(427+573\right)\)
\(=24\times1000\)
\(=24000\)
\(b,6\times1235\times20-5\times235\times24\)
\(=120\times1235-120\times235\)
\(=120\times\left(1235-235\right)\)
\(=1235\times1000\)
\(=1235000\)
\(8\cdot427\cdot3+6\cdot573+46\cdot1235\cdot20-5\cdot235\cdot24\)
\(=4\cdot2\cdot427\cdot3+6\cdot573+23\cdot2\cdot1235\cdot20-5\cdot235\cdot4\cdot3\cdot2\)
\(=4\cdot427\cdot6+6\cdot573+23\cdot2\cdot247\cdot5\cdot20-20\cdot5\cdot47\cdot3\cdot2\)
\(=6\cdot\left(4\cdot427+573\right)+23\cdot247\cdot200-47\cdot3\cdot200\)
\(=6\cdot\left(1708+573\right)+23\cdot\left(200+47\right)\cdot200-47\cdot3\cdot200\)
\(=6\cdot2281+23\cdot200\cdot200+23\cdot47\cdot200-47\cdot3\cdot200\)
\(=13686+23\cdot40000+20\cdot200\cdot47\)
\(=13686+920000+4000\cdot47\)
\(=13686+920000+188000\)
\(=13686+\left(920000+188000\right)\)
\(=13686+1108000=1121686\)
trời ơi là trời
làm đúng mà dis
mệt quá là mệt
thằng mô dis tui hử khai mau
tui dis hết luôn cho mà coi
\(510+427+480+425+573+575\)
\(=\left(510+480\right)+\left(427+573\right)+\left(425+575\right)\)
\(=990+1000+\)\(1000\)
\(=2990\)
(510+480)+(427+573)+(425+575)=990+1000+1000=990+2000=2990