Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
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
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
\(272:16-5+4\left(30-6-255:17\right)\)
\(=17-5+4.9\)
\(=12+36\)
\(=48\)
\(25.8-12.5+272:17-8\)
\(=200-60+16-8\)
\(=140+16-8\)
\(=148\)
- 272 : 16 - 5 + 4(30 - 6 - 255 : 17)
= 17 - 5 + 4.9
= 12 + 36
= 48
2. 25 . 8 - 12.5 + 272 : 17 - 8
= 200 - 60 + 16 - 8
= 140 + 16 - 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
tính nhanh hay tính bình thường???
tính bình thường nhoa:
52
148
17
k nhoa
272 : 16 - 5 + 4. ( 30 - 5 - 255 : 17 )
= 272 : 16 - 5 + 4. ( 30 - 5 - 15 )
= 272 : 16 - 5 + 4. 10
= 17 - 5 + 40
= 52
sua lai cho
\(=\)\(13.4\left(58+32+10\right)\)
\(=52.100\)
\(=5200\)
thong cam tai mk mat kem
1a) 25 .8 - 12.5 + 272 :17 - 8
= 200 - 60 + 16 - 8
= 140+16-8
= 156 - 8
= 148
b) 125: 25 +14 - 142 : 71
= 5 + 14 - 2
= 19 - 2 = 17
c) 13. 17 - 256: 16 + 14 : 7 - 1
= 221 - 16 + 2 - 1
= 205 + 2 - 1
= 207 - 1 = 206
d) 15 . 24 - 14 . 5 (145 : 5 - 27)
= 360 - 70 (29- 27)
= 360 - 70 . 2
= 360 - 140
= 220
2a) 37 + x = 55
x= 55 - 37
x = 18
b) x- 31 = 24
x = 24 + 31
x = 55
c) 21 (x-11) = 21
x - 11 = 21 : 21
x = 1 +11
x = 12
d ) 9. (x - 29)= 0
x - 29 = 0 :9
x = 29
e) (x - 1954) . 5 = 50
x - 1954 = 50 : 5
x = 1964
f ) 30 . 60 - x = 30
1800 - x = 30
x = 1800 - 30
x = 1770
Viết mỏi tay quá huhuh
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