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17 , 6 − 5 , 3 + 16 , 8 − 7 , 6 + 15 , 3 − 6 , 8 = 17 , 6 − 7 , 6 + 15 , 3 − 5 , 3 + 16 , 8 − 6 , 8 = 10 + 10 + 10 = 30
![](https://rs.olm.vn/images/avt/0.png?1311)
1,8x0,5x0,25=0,225
5x0,8x0,5x1,25=2,5
17,6-5,3+16,8-7,6+15,3-6,8=30
12,357-3,257-4,725=4,375
1,8 x 0,5 x 025 = 0225
5 x 0,8x 0,5x1,25= 2,5
17,6 - 5,3 + 16,8 - 7,6 + 15,3 - 6,8= 30
12,375 - 3,257 - 4,725= 4.393
hok tốt
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a) 17,6 - 5,3 + 16,8 - 7,6 + 15,3 - 6,8
= ( 17,6 - 7,6 ) + ( 16,8 - 6,8 ) + ( 15,3 - 5,3 )
= 10 + 10 + 10
= 30
b) 3,54 . 73 + 0,46 . 25 + 3,54 . 26 + 0,46 . 75 + 3,54
= 3,54 ( 73 + 26 + 1 ) + 0,46 ( 25 + 75 )
= 3,54 . 100 + 0,46 . 100
= 100 ( 3,54 + 0,46 )
= 100 . 4
= 400
a, 17,6 - 5,3 + 16,8 - 7,6 + 15,3 - 6,8
= ( 17,6 - 7,6 ) + ( 16,8 - 6,8 ) + ( 15,3 - 5,3 )
= 10 + 10 + 10
= 30
![](https://rs.olm.vn/images/avt/0.png?1311)
a) Ta có: 2,735+1,248+3,265+4,752
=(2,735+3,265)+(1,248+4,752)
=6+6=12
b) Ta có: (10,38+12,56+14,68)-(0,38+4,68+2,58)
=(10,38-0,38)+(12,56-2,58)+(14,68-4,68)
=10+10+9,98
=29,98
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có:
( 17,6 - 7,6 ) + ( 15,3 - 5,3 ) + ( 16,8-16,8 )
= 10+10+0
= 20
Nhớ tick cho mình nha. Đúng 100%, chúc bn hc tốt -_-
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(12,1.5,5+12,1.4,5=12,1.\left(5,5+4,5\right)=12,1.10=121\)
b) \(67,8+67,8.3,5+5,5.67,8=67,8.\left(1+3,5+5,5\right)=67,8.10=678\)
c) \(0,75+1,19+2,55+0,81=\left(0,75+2,55\right)+\left(1,19+0,81\right)=3,3+2=5,3\)
d) \(17,6-5,3+16,8-7,6+15,3-6,8=\left(17,6-7,6\right)+\left(-5,3+15,3\right)+\left(16,8-6,8\right)=10+10+10=10.3=30\)
\(a,\)\(12,1\times5,5+12,1\times4,5=12,1\times\left(5,5+4,5\right)=12,1+10=121\)
\(b,\)\(67,8+67,8\times3,5+5,5\times67,8\)
\(=67,8\times\left(5,5+3,5+1\right)=67,8\times10=678\)
\(c,\)\(0,75+1,19+2,55+0,81\)
\(=\left(0,75+2,55\right)+\left(1,19+0,81\right)\)
\(=3,3+2=5,3\)
\(d,\)\(17,6-5,3+16,8-7,6+15,3-6,8\)
\(=\left(17,6-7,6\right)+\left(16,8-6,8\right)+\left(15,3-5,3\right)\)
\(=10+10+10=30\)
![](https://rs.olm.vn/images/avt/0.png?1311)
(17,6-7,6)+(15,3-5,3)+(16,8-6,8)
=10+10+10=30
\(30\)