![](https://rs.olm.vn/images/avt/0.png?1311)
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có :
( -23 + 123 ) + ( -134 + 34 ) + 17
= 100 + (-100) + 17
= 0 + 17
= 17
![](https://rs.olm.vn/images/avt/0.png?1311)
\(57.61+77.43+69.57+43.53\)
\(=57.61+69.57+77.43+43.53\)
\(=57\left(61+69\right)+43\left(77+53\right)\)
\(=57.130+43.130\)
\(=130\left(57+43\right)=130.100=13000\)
=57(61+69)+43(77+53)
=57.130+43.130
=130(57+43)
=130.100
=13000
![](https://rs.olm.vn/images/avt/0.png?1311)
= 43*(77+53)+57*(61+69)
=43*130+57*130
=130*(43+57)
=133*100
=133000
hk tốt mih vs
57.61 + 77.43 + 69.57 + 43.53
= 57.(61+69) + 43.(77+53)
= 57.130 + 43.130
= 130.(57+43)
= 130.100
= 13000
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
( 1230 + x ) - 3517=2119
1230+x=2119+3517
1230+x=5636
x=5636-1230
x=4406
( 1230 + x ) - 3517 = 2119
1230 + x = 2119 + 3517
1230 + x = 5636
x = 5636 - 1230
x = 4406
![](https://rs.olm.vn/images/avt/0.png?1311)
Đáp án B
A = 4 5 17 - 3 4 5 + 8 15 29 - 3 5 17 - 6 14 29 A = 4 5 17 - 3 4 5 + 8 15 29 - 3 5 17 + 6 14 29 A = 4 5 17 - 3 5 17 + 8 15 29 + 6 14 29 - 3 4 5 A = 4 - 3 + 5 17 - 5 17 + 8 + 6 + 15 29 + 14 29 - 3 4 5 A = 1 + 0 + 14 + 1 - 3 4 5 A = 16 - 3 4 5 A = 15 5 5 - 3 4 5 = 12 1 5
![](https://rs.olm.vn/images/avt/0.png?1311)
Đáp án B
A = 4 5 17 - 3 4 5 + 8 15 29 - 3 5 17 - 6 14 29 A = 4 5 17 - 3 4 5 + 8 15 29 - 3 5 17 + 6 14 29 A = 4 5 17 - 3 5 17 + 8 15 29 + 6 14 29 - 3 4 5 A = 4 - 3 + 5 17 - 5 17 + 8 + 6 + 15 29 + 14 29 - 3 4 5 A = 1 + 0 + 14 + 1 - 3 4 5 A = 16 - 3 4 5 A = 15 5 5 - 3 4 5 = 12 1 5
[3517:3514+{43.53-(134-123)2}2]
= [ 3517-14 + { 64 . 125 - 112 }2 ]
= [ 353 + { 8000 - 121 }2 ]
= [ 42875 + 78802 ]
= [ 42875 + 62094400 ]
= 62137275