a)

=36-79+150+79-36

=36-36-79+79+150

=150

b)

=27-514-486+73

=27+73-514-486

=-900

c)

=35-42+14-35-58+86

=35-35-42-58+14+86

=0

d)

=125-153+87-125+13-47

=125-125-153-47+87+13

=-100

e)

=1267-196-267-304

=1267-267-196-304

=500

g)

=1152-374-1152-65+374

=1152-1152-374+374-65

=-65

help me please!

\(27.332+93.43+57.61+69.57\\ =27.332+93.43+57.\left(61+69\right)\\ =27.332+93.43+57.130\\ =8964+3999+7410=20373\\ 34.75+75.66-65.100\\ =\left(34+66\right).75-65.100\\ =100.75-65.100\\ =100.\left(75-65\right)\\ =100.10=1000\\ \left(456.11+912\right).37:13:74\\ =5928:13:\left(74:37\right)\\ =456:2=228\\ 6^2:4.3+2.5^2\\ =36:4.3+2.25\\ =9.3+50=27+50=77\\ 5.4^2-18:3^2\\ =5.16-18:9\\ =80-2=78\\\left[\left(315+372\right).3+\left(372+315\right).7\right]:\left(26.13+74.14\right)\\ =687.\left(3+7\right):\left(338+1036\right)\\ 687.10:1374\\ =6870:1374=5\\ 12:\left\{390:\left[500-\left(125+35.7\right)\right]\right\}\\ =12:\left[390:\left(500-370\right)\right]\\ =12:\left(390:130\right)=12:3=4\\ 192000-\left(1500.2+1800.3+1800.2:3\right)\\ =192000-\left(3000+5400+1200\right)\\ =192000-9600=182400\)

bài 1 tính 
`a, 45 + 128 + 55 - 28 `

`=(45 +55)+(128-28)`

`=100+ 100`

`=200`
`b, 2022.194 - 2022.94 - 2200`

`=2022.(194-94)-2200`

`=2022.100-2200`

`=202200-2200`

`=200000`

`c, 2^3 .2 -3^4 :3^2`

`=2^(3+1) - 3^(4:2)`

`=2^4 - 3^2`

`=16-9`

`=7`

`d, 560 : { 130 - [( 5 . 14 - 65 ) . 3 + 3 ]}`

`= 560 : { 130 - [(70-65) . 3 + 3 ]}`

`= 560 : [ 130 - (5 . 3 + 3 )]`

`= 560 : [ 130 - (15+3) ]`

`= 560 :(130-18)`

`=560: 112`

`=5`

\(=267\cdot100-265\cdot100=200\)

100 lấy ở đâu vậy ạ.

a) A= 100 - 116 : 4

=100-29

=71

b) B= 100 - [ 116 - (13 - 5)²]

=100-[116-8²]

=100-(116-64)

=100-52

=48

c) C= |- 65| + (- 42) + |65|

= 65+(-42)+65

= 88

Bài 1:

a, 386-287 -386 -13

= (386-386) -287-13

= 0 -300

=-300

b, =332-681 -232+431

= (332 -232) +(431-681)

= 100 - 250

= -150

Bài 2

a, = 27+65+ 364-27-65

= (27-27) +(65-65) +364

= 0+0+ 364

=364

b, = 42-69+17 -42-17

= (42-42) + (17-17) -69

= -69

chúc bạn học tốt nha!

65x42-130x21+1998

=65x (2x21)-130x21+1998

=(65x2)x21-130x21+1998

=130x21-130x21+1998

=0+1998

=1998

 253 - (-76 + 253) + 99 =175

68 - (199 + 68) - (-150) = -49

211 - (107 + 211) - 23 = -130

-(-345 + 56 - 267) + (453 - 124 - 843) =42

-25 - (34 - 256 + 67) - (-2) + (-10 - 65) =57.

\(34\times65+34\times13+34\)
\(=34\times\left(65+34+1\right)\)
\(=34\times100\)
\(=3400\)
#DatNe

=34(65+13+1)

=34*79

=2686