12x18+14x3-255:17

=216+42-15

=258-15

=243

68+42x5-625:25

=68+210-25

=278-25

=253

13+21x5-(198/11-8)

=13+105-(18-8)

=13+105-10

=118-10

=108

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

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

=17-5+4x(25-15)

=17-5+4x10

=17-5+40

=12+40

=52

25x8-12x5+272:17-8

=200-60+16-8

=140+16-8

=156-8

=148

Cho mình hỏi là một chương trình để tính tất cả hay là mỗi phép tính một chương trình

=200-12,5+10-8

=187,5+10-8

=197,5-8

=189,5

chúc bạn học tốt

25 x 8 - 12,5 + 170 : 17 - 8

=200 - 12,5 + 10 - 8

=187,5  + 10 - 8

=197,5 - 8

=189,5

trả lời:

25 x 8 -12,5+170:17-8

= 200 - 12,5 + 10 - 8 

= 187,5 + 10 - 8 
= 197,5 - 8

= 189,5

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

\(=17-5+4.9\)

\(=12+36\)

\(=48\)

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

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

\(=140+16-8\)

\(=148\)

          = 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

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

24/39x 26/17 - 10/27 = 16/17 - 10/27 = 262/459
2 + 8/7 : 2/5 = 2 + 20/7 = 34/7
968 x 59 +968 x 59 = 57112 + 36 = 57148

24/39x 26/17 - 10/27 =\(\dfrac{262}{459}\)
2 + 8/7 : 2/5=\(\dfrac{34}{7}\)
968 x 59 + 35 460 : 985= 57148

Số nhỏ ghia 

24/39x 26/17 - 10/27

=16/17- 10/27

=262/459
2 + 8/7 : 2/5

= 2+ 20/7

= 34/7
968 x 59 + 35 460 : 985

= 57112 + 36

= 57148

a) 17-(5-9)+3.(-6)=17-(-4)+(-18)=17+4-18=21-18=3

b)175-(-58)+(-40)+25=175+58-40+25=(175+25)+(58-40)=200+18=218

c)  (47-17).(-3)^2-8.(-6-24)=423-153+48+192=(432-153)+(48+192)=270+240=510

d)138-420+(-52)-(-272)=138-420-52+272=(138-420)+(-52+272)=-282+220=-62

2:

a: \(2^2\cdot3-4=4\cdot3-4=12-4=8\)

b: \(16-2^3\cdot2=16-2^4=16-16=0\)

c: \(4^2-4\cdot2=16-8=8\)

d: \(3^3-2\cdot3^2=27-2\cdot9=27-18=9\)

e: \(7^2-9\cdot2^2=49-9\cdot4=49-36=13\)

f: \(2^2\cdot3+4^2=4\cdot3+16=12+16=28\)

Bài 1:

a: \(13+21\cdot5-\left(198:11-8\right)\)

\(=13+105-18+8\)

=21+87

=108

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

\(=17-5+4\cdot\left(30-5-15\right)\)

\(=12+4\cdot10=12+40=52\)

c: \(15\cdot24-14\cdot5\cdot\left(145:5-27\right)\)

\(=360-70\left(29-27\right)\)

=360-140

=220

d: \(18\cdot3-18\cdot2+3\cdot\left(\dfrac{51}{17}\right)\)

\(=18\left(3-2\right)+3\cdot3\)

=18+9

=27

e: \(64+115+36-25\cdot8\cdot6\cdot2^2\cdot3+4^2\)

\(=100+115-200\cdot6\cdot4\cdot3+16\)

\(=231-14400=-14169\)

f: \(15\cdot8-\left(17-30+83\right)-144:6\)

\(=120-24-\left(100-30\right)\)

=96-70

=26