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![](https://rs.olm.vn/images/avt/0.png?1311)
a)
11 , 2 − 7 , 63 + 8 , 8 − 2 , 37 = 11 , 2 + 8 , 8 ⏟ − 7 , 63 + 2 , 37 ⏟ = 20 − 10 = 10
b)
3 , 45 × 123 + 4 × 3 , 45 − 3 , 45 × 27 = 3 , 45 × 123 + 4 − 3 , 45 × 27 = 3 , 45 × 127 − 3 , 45 × 27 = 3 , 45 × 127 − 27 = 3 , 45 × 100 = 345
![](https://rs.olm.vn/images/avt/0.png?1311)
a , 11 , 2 − 7 , 63 + 8 , 8 − 2 , 37 = 11 , 2 + 8 , 8 ⏟ − 7 , 63 + 2 , 37 ⏟ = 20 − 10 = 10 b , 3 , 45 × 123 + 4 × 3 , 45 − 3 , 45 × 27 = 3 , 45 × 123 + 4 − 3 , 45 × 27 = 3 , 45 × 127 − 3 , 45 × 27 = 3 , 45 × 127 − 27 = 3 , 45 × 100 = 345
![](https://rs.olm.vn/images/avt/0.png?1311)
3,45 x 99/100 + 3.45 x1/100
=3,45x(99/100+1/100)
=3,45x1
=3,45
3.45 x 99/100 + 3.45 + 1/100
3.45 x ( 99/100 + 1/100 )
3.45 x 1
3.45
đừng vu oan nhé
![](https://rs.olm.vn/images/avt/0.png?1311)
Câu 1:
= 3,45 x ( 123 + 4 - 27 )
= 345
Câu 2:
3 x x = 3,45 : 5
3 x x = 0,69
x= 0,69 : 3 = 0,23
Nhớ k cho mình
câu 2 (3*x)*5 = 3.45
3xx =3,45/5
3xx =0,69
3xx =0,69/3
x =0,23
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left(198,08\times23,56+165,9:27\right)\times\left(25,07\times3-75,21\right)+8,8\\ =\left(198,08\times23,56+165,9:27\right)\times\left(75,21-75,21\right)+8,8\\ =\left(198,08\times23,56+165,9:27\right)\times0+8,8\\ =0+8,8\\ =8,8\)
(198,08×23,56+ 165,9:27) × (25,07×3−75,21)+ 8,8
= (198,08 × 23,56 + 165,9 : 27) × (75,21 − 75,21) + 8,8
= (198,08× 23,56 +165,9:27) × 0 + 8,8
= 0+8,8
= 8,8
![](https://rs.olm.vn/images/avt/0.png?1311)
9,45-2,37+1,37
=9,45-(2,31-1,37)
=9,45-1
=8,45
3,45 x 123 + 4 x 3,45 - 3,45 x 27
= 3,45 x (123 + 4 - 27)
= 3,45 x 100
= 345
b) 21,2 + 7,63 + 8,8 + 2,37
= (21,2 + 8,8) + (7,63 + 2,37)
= 30 + 10
= 40
k mik nhé
=3,45*(123+4-27)
=3,45*100
=345
b)
=21,2+8,8+7,63+2,73
=30+10,36
=40,36