290-10.(20180+35:32)
71-50:[5+3.(57-6.7)]
4.25-56:23
375:53+(39:36-2.23)
32:{160:[300-(175+21.5)]}
290-10.(20180+35:32)
71-50:[5+3.(57-6.7)]
4.25-56:23
375:53+(39:36-2.23)
32:{160:[160:[300-(175+21.5)]}
290-10.(2018^0+3^5:3^2)
=290-10.(1+243:9)
=290-10.(1+27)
=290-10.28
=290-280
=10
71-50:[5+3.(57-6.7)]
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50+51+52+53+54+56+57+58+59+60+61+62+63+64+65+66+67+68+69+70=?
32 : { 160 : [ 300 - ( 175 + 21.5 ) ] }
\(32:\left\{160:\left[300-\left(175+21\times5\right)\right]\right\}=32:\left[160:\left(300-280\right)\right]=32:\left(160:20\right)=32:8=4\)
32 : { 160 : [ 300 - ( 175 + 21 . 5) ] }
=32 : { 160 : [ 300 - 280 ] }
=32 : { 160 : 20 }
=32 : 8
=4
k mình nha ^^
32 : {160 : [300 - (175 + 21.5)]}
= 32 : {160 : [300 - (175 + 105)]}
= 32 : {160 : [300 - 280]}
= 32 : {160 : 20}
= 32 : 8
= 4
Tính giá trị biểu thức:
a, 15 . { 32 : [ 6 - 5 + 5 ( 9 : 3 ) ] + 3 } - 2018 0
b, 25 . { 2 7 : [ 12 - 4 + 2 2 . 16 : 2 3 ] - 2 4 }
c, 2019 . { 101 - 1000 : [ 2 2 . 2 3 + 5 6 : 5 3 - 6 2 : 11 - 2018 0 ] }
a, 15 . { 32 : [ 6 - 5 + 5 ( 9 : 3 ) ] + 3 } - 2018 0
= 15.{32:[1+15]+3}–1
= 15.5–1
= 74
b, 25 . { 2 7 : [ 12 - 4 + 2 2 . 16 : 2 3 ] - 2 4 }
= 25.{128:[8+4.2]–16}
= 25.24
= 600
c, 2019 . { 101 - 1000 : [ 2 2 . 2 3 + 5 6 : 5 3 - 6 2 : 11 - 2018 0 ] }
= 2019.{101–1000:[(32+125–36):11–1]}
= 2019.{101–1000:[121:11–1]}
= 2019.{101–1000:10}
= 2019.1
= 2019
1 * 2 * 3 * 4 * 5 * 6 * 7 * 8 * 9 * 10 * 11 * 12 * 13 * 14 * 15 * 16 * 17 * 18 * 19 * 20 * 21 * 22 * 23 * 24 * 25 * 26 * 27 * 28 * 29 * 30 * 31 * 32 * 33 * 34 * 35 * 36 * 37 * 38 * 39 * 40 * 41 * 42 * 43 * 44 * 45 * 46 * 47 * 48 * 49 * 50 * 51 * 52 * 53 * 54 * 55 * 56 * 57 * 58 * 59 * 60 * 61 * 62 * 63 * 64 * 65 * 66 * 67 * 68 * 69 * 70 * 71 * 72 * 73 * 74 * 75 * 76 * 77 * 78 * 79 * 80 * 81 * 82 * 83 * 84 * 85 * 86 * 87 * 88 * 89 * 90 * 91 * 92 * 93 * 94 * 95 * 96 * 97 * 98 * 99 * 100 bằng bao nhiêu?
32.{160:[300-(175+21.5)]}
giúp mình với mình đang vội
32 . {160 : [ 300 - (175 + 21 . 5) ] }
= 32 . {160 : [ 300 - 280 ] }
= 32 . {160 : 20}
= 32 . 8
= 256
Trả lời
184
sai thì bỏ đi
Tính nhanh:
A,375–175+369-169+363-163+…+207-7
B,24-11+32-19+40-27+…+336-323
C,5-2+8-4+11-6+…+140-92
D,300-285+295-278+290-271+…+100-5+10
a: =(375-175)+(369-169)+...+(207-7)
=200+200+...+200
=200*[(375-207)/2+1]
\(=200\cdot85=17000\)
b: \(=\left(24-11\right)+\left(32-19\right)+\left(40-27\right)+...+\left(336-323\right)\)
\(=13\cdot\left[\left(336-24\right):8+1\right]=13\cdot40=520\)
c: \(=\left(5-2\right)+\left(8-4\right)+\left(11-6\right)+...+\left(140-92\right)\)
=3+4+5+...+48
Số số hạng là (48-3):1+1=45+1=46(số)
Tổng là: (48+3)*46/2=51*23=1173
d: \(=\left(300-285\right)+\left(295-278\right)+\left(290-271\right)+...+\left(100-5\right)+10\)
=15+17+19+...+95+10
Số số lẻ trong khoảng từ 15 đến 95 là:
(95-15):2+1=41(số)
Tổng của dãy số trên là:
10+(95+15)*41/2
=10+55*41
=2265
bài5
a, 20 - [30 - (5 - 1)2 ]
b, 71 + 50 : [5 + 3. (57 - 6.7)]
c, 4.{270 : [50 - (25 + 45 : 5)]}
d. 411 - [(107 + 3) : 5 - 22 ]
e, 450 - 5. [32. (75 : 73 - 41) - 12] + 18
f, 102 - 150 : [18 - 2. (10 - 8)2 ] + 10180
a: \(20-\left[30-\left(5-1\right)^2\right]\)
\(=20-\left[30-4^2\right]\)
\(=20-14=6\)
b: \(71+\dfrac{50}{5+3\left(57-6\cdot7\right)}\)
\(=71+\dfrac{50}{5+3\cdot\left(57-42\right)}\)
\(=71+\dfrac{50}{5+3\cdot15}=71+\dfrac{50}{50}=72\)
c: \(4\cdot\left\{270:\left[50-\left(2^5+45:5\right)\right]\right\}\)
\(=4\cdot\left\{270:\left[50-32-9\right]\right\}\)
\(=4\cdot\left\{\dfrac{270}{50-41}\right\}=4\cdot\dfrac{270}{9}=4\cdot30=120\)
d: \(411-\left[\dfrac{\left(107+3\right)}{5}-2^2\right]\)
\(=411-\left[\dfrac{110}{5}-4\right]\)
=410-22+4
=410-18
=392
e: \(450-5\left[3^2\left(7^5:7^3-41\right)-12\right]+18\)
\(=450-5\left[9\cdot\left(7^2-41\right)-12\right]+18\)
\(=450-5\cdot\left[9\cdot8-12\right]+18\)
=468-5*60
=468-300
=168
f:
\(102-150:\left[18-2\cdot\left(10-8\right)^2\right]+1018^0\)
\(=102-150:\left[18-2\cdot4\right]+1\)
\(=103-\dfrac{150}{18-8}=103-15=88\)