a,27.75+25.27-150

=27.(75+25)-150

=27.100-150

=2700-150

=2550

c,13.17-256:16+14:7-1

=221-16+2-1

=205+2-1

=208-1

=207

d,18:3+182+3.(51:17)

=18:3+182+3.3

=6+182+9

=188+9

=197

e,15-25:8(100.2)

=15-25:8.200

=15-3,125.200

=15-625

=-610

f,25.8-12.5+170:17-8

=200-60+10-8

=140+10-8

=150-8

=142

12:1400.(500-(125+25.70 tôi ko biết làm 

1. 12.18+14.3-255:17=216+42-15

                                  =258-15

                                  =243

yygjgjyvy

a) 12 : { 400 : [ 500 - ( 125 + 25 . 7 )]}

= 12 : { 400 : [ 500 - ( 125 + 175 )]}

= 12 : { 400 : [ 500 - 300 ]}

= 12 : { 400 : 200 }

= 12 : 2 

= 6

b) 5 . 22 - 18 : 3

= 110 - 6

= 104

c) 18 : 3 + 182 + 3 . ( 51 : 17 )

= 6 + 182 + 3.3

= 6 + 182 + 9

= 197

d) 25.8 - 12.5 + 170 : 17 - 8

= 1000 - 60 + 10 - 8

= 940 + 10 - 8

= 940 + 2

= 942

a, mk làm kết quả lun.

=12:{400:[500-(125+175)]}

=12:{400:[500-300]}

=12:{400:200}

=12:2

=6

b,

=110-18:3

= 110-6

=104

k mk nha. k xong mk làm tiếp. dài quá nhưng cx dễ

a) 12 : { 400 : [500 – (125 + 25 . 7)]} 

=12 : { 400 : [500 – (125 + 175)]} 

=12 : [ 400 : [500 – 300)]

=12 : (400:200)

=12:2=6

b) 5 . 2² – 18 : 3

=5.4-6

=20-6=14

c) 18 : 3 + 182 + 3.(51 : 17)

=5+182+3.3

=187+9=196

d) 25 . 8 – 12.5 + 170 : 17 – 8

=200-60+10-8

=142

e) 2.5²+ 3: 71⁰ – 54: 3³ 

=2.25+3:1-54:27

=50+3-2

=51

f) 189 + 73 + 211 + 127

=(189+211)+(73+127)
=400+200=600

g) 375 : {32 – [ 4 + (5. 32– 42)]} – 14 )

 =375 : {32 – [ 4 + (160– 42)]} – 14 )

 =375 : [32 – ( 4 + 118) – 14 ]

=375:(32-122-14)

=375:-104

=-375/104

h) (5²⁰²² + 5²⁰²¹) : 5²⁰²¹

=(5²⁰²²:5²⁰²¹)+(5²⁰²¹:5²⁰²¹)

=5+1=6

a) 12.18 + 14.3 – 255:17

= 216 + 42 – 15

= 273 

b)  13 + 42.5 – (198:11 – 8)

= 13 + 210 – 10

= 213

c) 25.8 – 12.5 + 272:17 – 8

= 200 – 60 +16 – 8

= 148

d,  2 3 - 5 3 : 5 2 + 12 . 2 2

= 8 – 5 +48

= 51

13 + 21.5 - (198 : 11 - 8)

= 13 + 105 - 10

= 108

272 : 16 - 5 +4 (30 - 5 - 255 : 17)

= 17 - 5 + 4. ( 30 - 5 - 15 )

= 16 . 10

= 160

15.24 - 14.5 (145 : 5 - 27)

= 360 - 70 ( 29 - 27 )

= 290 . 2

= 580

18.3 - 18.2 + 3 (51 : 17)

= 54 - 36 + 3 . 3

= 54 - 36 + 9

= 27

(64 + 115 + 36) - 25.8

= 215 - 200 

= 15

15.8 - (17 - 30 + 83) - 144 : 6

= 120 - 70 - 24

= 26

250 : 50 - (46 - 75 + 54) : 5

= 5 - 25 : 5 

= 5 - 5

= 0

13 (17 - 95 + 83) : 5 - 18 : 9

= 13. 5 : 5 - 2

= 65 : 5 - 2

= 13 - 2

= 11

140 - 180(47 - 90 + 43) + 7

= 140 - 180 . 0 + 7

= 140 + 7

= 147

24 (15 + 30 + 85 - 120):10

= 24. 10 : 10 

= 240 : 10

= 24

27 + 73 - 30 : (25 -10)

= 27 + 73 - 30 : 15

= 27 + 73 - 2

= 98

18 - 4 (27 - 90 + 73) : 10

= 18 - 4. 10 : 10

= 18 - 40 : 10

= 18 - 4

= 14

Bài 2: Tính

140 - [ 25 : (4 mũ 2 - 11) + 4 ]

= 140 - [25 : (16 - 11) + 4 ]

= 140 - [ 25 : 5 + 4 ]

= 140 - [ 5 + 4]

= 140 - 9 

= 131

\(272:16-5+4\left(30-6-255:17\right)\)

\(=17-5+4.9\)

\(=12+36\)

\(=48\)

\(25.8-12.5+272:17-8\)

\(=200-60+16-8\)

\(=140+16-8\)

\(=148\)

          = 17 - 5 + 4.9

          = 12 + 36

          = 48

      2. 25 . 8 - 12.5 + 272 : 17 - 8

        = 200 - 60 + 16 - 8

        = 140 + 16 - 8

        = 148

dễ mà bạn

272:16-5+4(30-6-255:17)

= 272:16-5+4(30-6-15)

= 272:16-5+4(24-15)

= 272:16-5+4.9

= 17-5+36

= 12+36=48

25.8-12.5+272:17-8

= 200-60+16-8

= 140+16-8

= 156-8

= 148