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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(17.85+15.17-120\)
\(=17.\left(15+85\right)\)\(-120\)
\(=17.100-120\)
\(=1700-120\)
\(=1580\)
17.85+15.17-120
=17.(15+85)-120
=17.100-120
=1700-120
=1580
K cho mk nha
![](https://rs.olm.vn/images/avt/0.png?1311)
17.85 + 15.17 - 20
= 17.(85 + 15) - 20
= 17.100 - 20
= 1700 - 20
= 1680
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
17 . 85 + 15 . 17 - 120
= 17 . (85 + 15) - 120
= 17 . 100 - 120
= 1700 - 120
= 1580
![](https://rs.olm.vn/images/avt/0.png?1311)
(17.85 + 15.17) + (-120)
= 17.85 + 15.17 + (-120)
= 17.(85 + 15) + (-120)
= 17.100 + (-120)
= 1700 + (-120)
= 1580
(17.85+15.17)+(-120)
=((17.(85+15))+(-120)
=17.100+(-120)
=1700+(-120)
=1580
![](https://rs.olm.vn/images/avt/0.png?1311)
17.85 + 15.17 – 120 = 17.(85 + 15) – 120 = 17.100 – 120 = 1700 – 120 = 1580
![](https://rs.olm.vn/images/avt/0.png?1311)
17.85+15.17-120+20120
=17.(85+15)-120+1
=17.100-120+1
=1700-120+1
=1580+1
=1581
![](https://rs.olm.vn/images/avt/0.png?1311)
17 . 85 + 15 . 17 - 120
= 17 . ( 85 + 15 ) - 120
= 17 . 100 - 120
= 170 - 120
= 50
![](https://rs.olm.vn/images/avt/0.png?1311)
17 . 85 + 15 . 17 - 120
= 17 . ( 85 + 15 ) - 120
= 17 . 100 - 120
= 1700 - 120
= 1580
17 . ( 85 + 15 ) - 120
=17 . 100 - 120
=1700 - 120
=1580