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a)106:6+101:6
=(106+101):6
=207:6
=34,5
b)100:9-79,3:9
=(100-79,3):9
=20,7:9
=2,3
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a: \(20,23\cdot7,5+20,23+20,23+20,23:2\)
\(=20,23\cdot7,5+20,23\cdot2+20,23\cdot0,5\)
\(=20,23\left(7,5+2+0,5\right)\)
\(=20,23\cdot10=202,3\)
b: \(100:9-79,3:9\)
\(=\left(100-79,3\right):9\)
\(=20,7:9=2,3\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a, 20,18 x 7,5 + 20,18 + 20,18 + 20,18 : 2
= 20,18 x 7,5 + 20,18 x 1 + 20,18 x 1 + 20,18 x 0,5
= 20,18 x ( 7,5 + 1 + 1 + 0,5)
= 20,18 x 10
= 201,8
b, 100 : 9 - 79,3 : 9
= (100 - 79,3) : 9
= 20,7 : 9
= 2,3
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
1.106:6+101:6
=(106+101):6
=207:6
=34,5
2.100:9-79,3:9
=(100-79,3):9
=20,7:9
=2,3
3.10,6:x+7,19:x=3
(10,6+7,19):x=3
17,79:x=3
x=17,79:3
x=5,93
4.7:x-3,9:x=5
(7-3,9):x=5
3,1:x=5
x=3,1:5
x=0,62
cau 1=34,5
cau 2 =2,3
cau 3 =5,93
cầu 4 =0,62
CÁC BAN THẤY DÚNG K CHO MINH 1 K DI
![](https://rs.olm.vn/images/avt/0.png?1311)
100 : 9 + 79,3 : 9
= (100 + 79,3) : 9
= 179,3 : 9
= 19,9222222.....
![](https://rs.olm.vn/images/avt/0.png?1311)
$1-2+3-4+5-6+.....+97-98+99-100+101$
$= (1-2) + (3-4) + (5-6) + ...... + (99-100) + 101
$= (-50) + 101$
$= 51$
a) 106: 6 + 101: 6
= (106 + 101): 6
= 207: 6
= 34,5
b) 100: 9 - 79,3: 9
= (100 - 79,3): 9
= 20,7: 9
= 2,3
106:6+101:6
=(106+101):6
=207:6
=34,5
100:9-79,3:9
=(100-79,3):9
=20,7:9
=2,3
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