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2575 + 37 – 2576 – 29 = (2575 – 2576) + (37 – 29) = -1 + 8 = 7
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 7 23 + 16 23 + − 5 9 + − 4 9 + − 5 8 = − 5 8
b) − 2 9 + − 3 4 + − 1 36 + 1 3 + 3 5 + 1 5 = 0
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 7 23 + − 10 18 + − 4 9 + 16 23 + − 5 8 = 7 23 + 16 23 + − 5 9 + − 4 9 + − 5 8 = − 5 8
b) 1 3 + − 3 4 + 3 5 + − 1 36 + 1 15 + − 2 9 = 1 3 + 3 5 + 1 15 + − 3 4 + − 1 36 + − 2 9 = 0
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có :\(37.\left(29-23\right)-29.\left(37-23\right)=37.29-37.23-29.37+29.23\)
\(=23.29-37.23\)
\(=23.\left(29-37\right)\)
\(=23.\left(-8\right)\)
\(=-184\)
![](https://rs.olm.vn/images/avt/0.png?1311)
37. (29 − 23) − 29.(37 − 23)
=[ 37.29 − 37.23 ] − [ 29.37 − 29.23 ]
=(37.29)-(37.23)-(29.37)+(29.23)
=(29.23)-(37.23)
=23(29-37)
=23.(-8)
=-184
37 . (29 - 23) - 29. (37 - 23)
= 37 . 29 - 37 . 23 - 29 . 37 - 29 . 23
= 37 . (29 - 29) - 23 . (37 - 29)
= 37 . 0 - 23 . 8
= 0 - 184
= 0 + (-184)
= -184
Hok Tốt
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a) Ta có: \(17\cdot\left[29-\left(-111\right)\right]+29\cdot\left(-17\right)\)
\(=17\cdot\left[29+111-29\right]\)
\(=17\cdot111=1887\)
b) Ta có: \(19\cdot43+\left(-20\right)\cdot43-\left(-40\right)\)
\(=43\cdot\left(19-20\right)+40\)
\(=-43+40=-3\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a)\(2575+37-2576-29=\left(2575-2576\right)+\left(37-29\right)=-1+9=8\)
b)\(34+35+36+37-14-15-16-17\)
\(=\left(34-14\right)+\left(35-15\right)+\left(36-16\right)+\left(37-17\right)\)
\(=20+20+20+20+20\)
\(=20.5\)
\(=100\)
![](https://rs.olm.vn/images/avt/0.png?1311)
173 - 536 + 173 - [ 29 - 29 + 526 ]
= 173 - 536 + 173 - 526
= ( 173 + 173 ) - 536 - 526
= 346 - 536 - 526
= -716
Bài giải
\(173-536+173-[29-29+526]\)
\(=(173+173 )-536-[( 29-29)+526]\)
\(=346-536-526\)
\(=346-\left(536+526\right)\)
\(=346-1042\)
\(=-716\)