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câu 1:
-125+100+80+125-180
= (-125+125)+100+(80-180)
= 0+100-100
=0
câu 2:
27+55+(-17)-75
= (27-17)+(55-75)
= 10-20
=-10
Câu 3:
-92+( -253)-8+251
= (-92-8)+(-253+251)
= -100-2
= -102
Câu 4:
-351+(-95)+131-5
= (-351+131)+(-95-5)
= -220 - 100
=-320
![](https://rs.olm.vn/images/avt/0.png?1311)
C =[125.(73-75)]:(-25)2
=125.(-2):(-25).2
=-250:(-50)
=5
E=125.9.(-4).(-8).25.7
=125.(-8).25.(-4).7.9
=-1000.(-100).63
=6300000
C = ( 125 . 73 - 125 . 75 ) : ( -50)
C = 125 .( -2 ) : (-50)
C = -250 : -50
C = 50
G = ( -3 )2+( -5)3: l -5 l
G = 9 + ( -125) : 5
G = 9 + ( -25 )
G= ( -16 )
E = 125 .9.*( -4 ) . ( -8) .25.7
E = 25.5 .( -4 ) .9 .2. ( -4 ) .25 .7
E =( -100 ).10.( -100).63
E = 10000.630
E = 630000
**** mha
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1: \(23+\left(-13\right)+\left(-50\right)\)
\(=23-13-50\)
=10-50
=-40
2: \(-5+15+\left(-123\right)\)
\(=\left(-5+15\right)-123\)
=10-123
=-113
3: \(5871:\left\{928-\left[\left(-82+247\right)\right]\right\}\cdot5\)
\(=5871-\left\{928+82-247\right\}\cdot5\)
\(=5871-763\cdot5=5871-3815=2056\)
4: \(40-\left(4\cdot5^2-3\cdot2^3\right)\)
\(=40-4\cdot5^2+3\cdot2^3\)
\(=40-4\cdot25+3\cdot8\)
=40-100+24
=64-100
=-36
5: \(6^2\cdot5-7^2+149\)
\(=36\cdot5-49+149\)
\(=180+149-49\)
=180+100
=280
6: \(-210:\left[16+3\cdot\left(6+3\cdot2^2\right)\right]+\left(-2022\right)\)
\(=-210:\left[16+3\cdot\left(6+3\cdot4\right)\right]+\left(-2022\right)\)
\(=-210:\left[16+3\cdot18\right]+\left(-2022\right)\)
\(=-210:70-2022\)
=-3-2022
=-2025
7: \(5\cdot2^3+7^{11}:7^9-2023^0\cdot1^8\)
\(=5\cdot8+7^2-1\)
=40+49-1
=39+49
=88
8: \(400:\left\{5\cdot\left[360-\left(290+2\cdot5^2\right)\right]\right\}\)
\(=400:\left\{5\cdot\left[360-290-2\cdot25\right]\right\}\)
\(=400:\left\{5\cdot20\right\}\)
\(=\dfrac{400}{100}=4\)
9: \(75-\left(3\cdot5^2\right)-4\cdot5^3\)
\(=75-3\cdot25-4\cdot5^3\)
=-4*125
=-500
![](https://rs.olm.vn/images/avt/0.png?1311)
4^3=64 5^2=10
64 x 125 - 125 x 10
= 8000 - 1250
=6750
đáp án : 6750
![](https://rs.olm.vn/images/avt/0.png?1311)
2:
1: =>36x+14x=69+81=150
=>50x=150
=>x=3
2: 3^x=81
=>3^x=3^4
=>x=4
3: 3(2x+1)^2=75
=>(2x+1)^2=25
=>2x+1=5 hoặc 2x+1=-5
=>x=-3 hoặc x=2
1:
1: \(\dfrac{13\cdot17^4+4\cdot17^4}{17^3}-\dfrac{14\cdot3^3-14\cdot3^2}{9}\)
\(=\dfrac{17^4\cdot\left(13+4\right)}{17^3}-\dfrac{14\cdot3^2\left(3-1\right)}{9}\)
\(=17\cdot17-14\cdot2\)
=289-28
=261
2:
\(2^3\cdot5^2-\left[131-\left(23-2^3\right)^2\right]\)
\(=8\cdot25-131+\left(-1\right)^2\)
=69+1
=70
![](https://rs.olm.vn/images/avt/0.png?1311)
câu 1
32. ( 64 + 36 )
= 32 . 100
= 900
các câu khác bạn cũng làm như vậy nha. chúc bạn học tốt
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left(5^{45}.5^{125}\right):5^{171}=\left(5^{45+125}\right):5^{171}=5^{170}:5^{171}=5^{170-171}=\frac{1}{5}\)
1) 125-(-75)-326+26
= 125+75-326+26
=200-300
=-100
2) (-5).(-3)³-(-2).5²-75
= -5.-27+2.25-75
= -135+50-75
=-160
Câu1: Tính
1) 125-(-75)-326+26
=125+75-326+26
=125+75-300
=200-300
=-100
2) (-5).(-3)³-(-2).5²-75
=(-5).(-27)-(-50)-75
=(-5).(-27)+50-75
=135+50-75
=110