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513 + 143 - 513 + 43
= (513 - 513) + (143 + 43)
= 0 + 186
= 186
a) (273 - 51) - [73 - (-149)]
= 273 - 51 - 73 - 149
= (273 - 73) - (51 + 149)
= 200 - 200
= 0
b) 130 - [13 . 3 - (19-16)2
= 130 - (39 - 32)
= 130 - (39 - 9)
= 130 - 30
= 100
a) \(\left(273-51\right)-\left[73-\left(-149\right)\right]\)
\(=273-51-73-149\)
\(=\left(273-73\right)-\left(51+149\right)\)
\(=200-200\)
\(=0\)
b) \(130-\left[13.3-\left(19-16\right)^2\right]\)
\(=130-\left(39-3^2\right)\)
\(=130-\left(39-9\right)\)
\(=130-30\)
\(=100\)
a) 485 + (-248) + (-85) + 48
= (485 - 85) + (48 - 248)
= 400 - 200
= 200
b) 423 + {584 - [474 + (273 + 97.3)]}
= 423 + {584 - [474 + (273 + 291)]}
= 423 + [584 - (474 + 564)]
= 423 + (584 - 1038)
= 423 - 454
= -31
c) 238 + 12²^² - 20000
= 238 + 12⁴ - 20000
= 238 + 20736 - 20000
= 238 + 736
= 974
a, 485 + (-248) + (-85) + 48
= (485 - 85) - (248 - 48)
= 400 - 200
= 200
154+17+(-154)-83
=154-154+17-83
=0+17-38
=17-38
=-21
143+151+(-43)+(-251)
=(143-43)+(151-251)
=100+(-100)
=0
a) \(154+17+\left(-154\right)+83\)
\(=\left[154+\left(-154\right)\right]+\left(17+83\right)\)
\(=0+100\)
\(=100\)
b) \(143+151+\left(-43\right)+\left(-251\right)\)
\(=\left[143+\left(-43\right)\right]+\left[151+\left(-251\right)\right]\)
\(=100+\left(-100\right)\)
\(=0\)
a, 217 + [ 43 + ( - 217 ) + ( - 23 ) ]
= 217 + 43 - 217 - 23
= ( 217 - 217 ) + ( 43 - 23 )
= 0 + 20 = 20
b, 273 + ( -123 ) = 273 - 123
= 150
c, 1 + ( -3 ) + ( -5 ) + (- 7 ) + ( - 11 )
= [ 1 + ( -11 ) ] + [ ( -3 ) + ( -7 ) ] + ( - 5 )
= ( -10 ) + ( -10 ) + ( -5 )
= - 25 .
a)217+[43+(-217)+(-23)]
=217+43-217-23
=(217-217)+(43-23)
=0+20
=20
b)273+(-123)
=273-123
=150
c)1+(-3)+(-5)+(-7)+(-11)
=1-3-5-7-11
=-2-5-7-11
=-(2+5+7+11)
-25
a) (–38) + 28 = –(38 – 28) = –10.
b) 273 + (–123) = 273 – 123 = 150.
c) 99 + (–100) + 101 = (99 + 101) + (–100) = 200 + (–100) = 100.
Xin lỗi! Mình chưa học tới số nguyên! Mong bạn thông cảm!!@@
\(a,149-\left(39+49\right)\)
\(=149-39-49\)
\(=110-49\)
\(=61\)
\(b,\left(-273\right)-\left(148-273\right)\)
\(=\left(-273\right)-\left(-125\right)\)
\(=-148\)
\(c,\left(143-54\right)-\left(43-154\right)\)
\(=143-54-43+154\)
\(=\left(143-43\right)+\left(154-54\right)\)
\(=100+100\)
\(=200\)
a.
\(149-\left(39+49\right)=149-49-39\)
\(=100-39=61\)
b.
\(\left(-273\right)-\left(148-273\right)=\left(-273\right)+273-148\)
\(=0-148=-148\)
c.
\(\left(143-54\right)-\left(43-154\right)=143-54-43+154\)
\(=\left(143-43\right)+\left(154-54\right)\)
\(=100+100=200\)