Tính nhanh
b. 58216 + 427 + 1784 + 573
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
8×427×3+6×563×48×427×3+6×563×4
=24×427+24×563=24×427+24×563
=24×(427+563)=24×(427+563)
=24×1000=24×1000
=24000
8×427×3+6×563×48×427×3+6×563×4
=24×427+24×563=24×427+24×563
=24×(427+563)=24×(427+563)
=24×1000=24×1000
=24000
![](https://rs.olm.vn/images/avt/0.png?1311)
= 24 x 427 + 24 x 573
= 24 x (427 + 573)
= 24 x 1000
= 24000
![](https://rs.olm.vn/images/avt/0.png?1311)
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
![](https://rs.olm.vn/images/avt/0.png?1311)
a ) 32684 + 41325 + 316 + 675
=(32684+316)+(41325+675)
=33000+42000
=75000
b) 58216 + 427 + 1784 + 573
=(58216+1784)+(427+573)
=60000+1000
=61000
![](https://rs.olm.vn/images/avt/0.png?1311)
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) \(-68+68.\left(-76\right)+68.\left(-23\right)\)
\(=68.\left(-1\right)+68.\left(-76\right)+68.\left(-23\right)\)
\(=68.\left(-1+-76+-23\right)\)
\(=68.-10=-6800\)
![](https://rs.olm.vn/images/avt/0.png?1311)
8 x 427 x 3 + 6 x 573 x4=
8x3x427+6x4x573=24x427+24x573=24x(427+573)=24x1000=24000
= 2400 nhé
![](https://rs.olm.vn/images/avt/0.png?1311)
\(8\cdot427\cdot3+6\cdot573+46\cdot1235\cdot20-5\cdot235\cdot24\)
\(=4\cdot2\cdot427\cdot3+6\cdot573+23\cdot2\cdot1235\cdot20-5\cdot235\cdot4\cdot3\cdot2\)
\(=4\cdot427\cdot6+6\cdot573+23\cdot2\cdot247\cdot5\cdot20-20\cdot5\cdot47\cdot3\cdot2\)
\(=6\cdot\left(4\cdot427+573\right)+23\cdot247\cdot200-47\cdot3\cdot200\)
\(=6\cdot\left(1708+573\right)+23\cdot\left(200+47\right)\cdot200-47\cdot3\cdot200\)
\(=6\cdot2281+23\cdot200\cdot200+23\cdot47\cdot200-47\cdot3\cdot200\)
\(=13686+23\cdot40000+20\cdot200\cdot47\)
\(=13686+920000+4000\cdot47\)
\(=13686+920000+188000\)
\(=13686+\left(920000+188000\right)\)
\(=13686+1108000=1121686\)
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
Ta có:
\(\text{58216 + 427 + 1784 + 573}\\ =\text{(58216 + 1784 )+ (573+427)}\\ =10000+1000\\ =11000\)
Đs....