4268*35-62676:18=
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![](https://rs.olm.vn/images/avt/0.png?1311)
a) 468 + 379 = 847
379 + 468 = 847
b) 6509 + 2876 = 9385
2876 + 6509= 9385
c) 4268 + 76 = 4344
76 + 4268 =4344
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left(-18\right).35+65.\left(-18\right)\\ =\left(-18\right)\left(35+65\right)\\ =\left(-18\right).100\\ =-1800\)
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35/46:(35/17+3/18)
35/46:227/102
35/46×102/227
1785/5221
![](https://rs.olm.vn/images/avt/0.png?1311)
18. 25 + 35 + 15. 32 + 35. 49
=450+35+480+1715
=485+480+1715
=965+1715
=2680
Ta có:
18.25 + 35 + 15.32 + 35.49
= 450 + 35 + 480 + 1715
= 2680
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`@` `\text {Ans}`
`\downarrow`
`18*15 + 35 + 15*32 + 35*49`
`= 15 (18+32) + 35(1+49)`
`= 15*50 + 35*50`
`= 50*(15+35)`
`= 50*50`
`= 2500`
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\dfrac{9}{14}+\dfrac{19}{18}+\dfrac{19}{14}+\dfrac{35}{18}=\left(\dfrac{9}{14}+\dfrac{19}{14}\right)+\left(\dfrac{19}{18}+\dfrac{35}{18}\right)=\dfrac{28}{14}+\dfrac{54}{18}=2+3=5\)
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a, 18.(-24) + 35.42 - 18.76 + 35.(-142)
= [ 18.(-24) - 18.76] + (35.42 + 35(-142)]
= -18.[ 24 + 76] - 35.( 142 - 42)
= -18.100 - 35. 100
= - 100.(18 + 35)
= - 100. 53
= - 5300
h, 104 : (-13) - [56 - 220 : (-4)]
= 104 : (-13) - [ 56 + 55]
= -8 - 111
= - 119
4268 x 35 - 62676 : 18
= 149380 - 3482
= 145898
145898