tính giá trị biểu thức
i) 102 - 60 : ( 56 : 54 - 3.5) j) 2345 - 1000 : [ 19 - 2(21 - 18)2 ] k) 205 - [ 1200 - ( 42 - 2.3)3]
Thực hiện phép tính (Tính nhanh nếu có thể)
a) 2345 − 1000 : [19-2(21-18) 2 ]
b) 205 − [ 1200 − ( 4 2 − 2.3 ) 3 ]
a) 2345 − 1000 : [19-2(21-18) 2 ]=2345-1000:1=1345
b) 205 − [ 1200 − ( 4 2 − 2.3 ) 3 ]=205-( 1200 − 1000 ) = 5
i) 10^2-60:(5^6:5^4-3.5)
j)2345-1000:[19-2(21-18)^2]
k)205-[1200-(4^2-2.3)^3]:40
l)500-{5[409-(2^3.3-21)^2]+10^3}:15
n)(-23)+13+(-17)+57
o)(-123)+ -13+(-7)
p)-10+45+ (- -455) + -750
h)9.40-37-2.13-52
k) 2345 – 1000 : [19 – 2(21 – 18)2 ] l) 128 – [68 + 8(37 – 35)2 ] : 4
m) 568 – {5[143 – (4 – 1)2 ] + 10} : 10
n) 107 – {38 + [7.32 – 24 : 6+(9 – 7)3 ]}:15
o) 307 – [(180 – 160) : 22 + 9] : 2
p) 205 – [1200 – (42 – 2.3)3 ] : 40
q) 177 :[2.(42 – 9) + 32 (15 – 10)]
r) [(25 – 2 2 .3) + (32 .4 + 16)]: 5
s) 125(28 + 72) – 25(32 .4 + 64)
giúp mk
s: \(=125\cdot100-25\cdot192\)
\(=12500-4800\)
=7700
a) 2345 – 1000 : [19 – 2(21 – 18)2] b) 128 – [68 + 8(37 – 35)2] : 4 c) 568 – {5[143 – (4 – 1)2] + 10} : 10 d) 107 – {38 + [7.32 – 24 : 6+(9 – 7)3]}:15 e) 307 – [(180 – 160) : 22 + 9] : 2 f) 205 – [1200 – (42 – 2.3)3] : 40 g) 177 :[2.(42 – 9) + 32(15 – 10)] h) [(25 – 22.3) + (32.4 + 16)]: 5 i) 125(28 + 72) – 25(32.4 + 64) j) 500 – {5[409 – (23.3 – 21)2] + 103} : 15 |
Viết số mũ giùm mình ạ!
a: \(=47-\left[\left(45\cdot16-25\cdot12\right):14\right]\)
\(=47-30=17\)
b: \(=50-\left[6+34\right]\)
=50-40
=10
Thực hiện phép tính rồi phân tích kết quả ra thừa số nguyên tố:
a, 75 + 58.50 – 58.25
b, 20: 2 2 – 5 9 : 5 8
c, 5 19 : 5 17 - 4 : 7
d, 47 - 45 . 2 4 - 5 2 . 12 : 14
e, 10 2 : 60 : 5 6 : 5 4 - 3 . 5
f, 2345 - 1000 : 19 - 2 21 - 18 2
g, 500 – {5.[409 – 2 3 . 3 - 21 2 ]+ 10 3 }:15
h, 967 – [8 + 2 . 3 2 – 24:6 + 9 - 7 3 ].5
a, 75 + 58.50 – 58.25 = 3.25 + 58.(50 – 25) = 3.25 + 58.25 = 25.(3+58) = 25.61 = 1525
Ta có: 1525 = 5 2 . 61
b, 20: 2 2 – 5 9 : 5 8 = 20:4 – 5 = 5 – 5 = 0
c, 5 19 : 5 17 - 4 : 7 = 5 2 - 4 : 7 = (25 – 4):7 = 3
d, 47 - 45 . 2 4 - 5 2 . 12 : 14 = 47 – (45.16 – 25.12):14 = 47 – (720 – 300):14 = 47 – 420:14 = 47 – 30 = 17
e, 10 2 : 60 : 5 6 : 5 4 - 3 . 5 = 100 – 60: 5 2 - 15 = 100 – 60:(25 – 15) = 100 – 60:10 = 100 – 6 = 94
Ta có: 94 = 2.47
f, 2345 - 1000 : 19 - 2 21 - 18 2 = 2345 – 1000:(19 – 2. 3 2 ) = 2345 – 1000:(19 – 2.9) = 2345 – 1000:(19 – 18) = 2345 – 1000:1 = 2345 – 1000 = 1345
Ta có: 1345 = 3.269
g, 500 – {5.[409 – 2 3 . 3 - 21 2 ]+ 10 3 }:15 = 500 – {5.[409 – 8 . 3 - 21 2 ]+1000}:15 = 500 – {5.[409 – 3 2 ]+1000}:15 = 500 – {5.(409 – 9)+1000}:15 = 500 – {5.400+1000}:15 = 500 – (2000+1000):15 = 500 – 3000:15 = 500 – 200 = 300
Ta có: 300 = 2 2 . 3 . 5 2
h, 967 – [8 + 2 . 3 2 – 24:6 + 9 - 7 3 ].5 = 967 – [8+2.9 – 4+8].5 = 967 – 30.5 = 967 – 150 = 817
Ta có: 817 = 19.43
20:22-59:58 29-[16+3.(51-49)]
(519:517-4):7 47.(45.24-52.12):14
-84:4+39:37+50 102-60:(56:54-3.5)
295-(31-22.5)2 2345-1000:{19-2(21-18)2
1125:1123-35:(110+23)-60 205-[1500-(42-2.3)3]
sau 58 ,7,50 ,2,-60 là phép tính khác .
mấy b giúp mk nha ?
J. 2345-1000 : [ 19 - 2 ( 21 - 18 )2 ]
F. 1125 : 1123 - 33 + 50
E. 295 + ( 31 - 22 . 5 )2
H. 47 + ( 45 . 24 - 52 . 12) : 14
I. 102 - 60 : ( 56 : 54 - 3 . 5 )
K. 205 + [ 1200 - ( 42 - 2 . 3 ) 3 ] : 40
L. 500 - { 5 . [ 409 - ( 23 . 3 - 21 ) 2 ] + 103 } : 15
Giải giúp mình với . Mình cảm ơn rất nhiều .
J.
=2345-1000:[19-2*(3^2)]
=2345-1000:[19-18]
=2345-1000:1
=2345-1000
=1345
F.
=(11^2)-(3^2)*-3+50
=[(11-3)^2]*-3+50
=(8^2)*-3+50
=64-3+50
=61+50
=111
E.
=295+(31-4*5)
=295+(31-20)
=295+11
=306
mik het bit làm r
J. 2345-1000 : [ 19 - 2 ( 21 - 18 )2 ]
= 2345 - 1000 : [ 19 - 2.32 ]
= 2345 - 1000 : (19 - 18)
= 2345 - 1000
= 1345.
F. 1125 : 1123 - 33 + 50
= 112 - 27 + 50
= 121 - 27 + 50
= 144
E. 295 + ( 31 - 22 . 5 )2
= 295 + (31 - 4.5)2
= 295 + 112
= 295 + 121
= 416
H. 47 + ( 45 . 24 - 52 . 12) : 14
= 47 + (45 . 16 - 25.12) : 14
= 47 + 420 : 14
= 47 + 30
= 77
I. 102 - 60 : ( 56 : 54 - 3 . 5 )
= 100 - 60 : (25 - 15)
= 100 - 60 : 10
= 100 - 6
= 94.
K. 205 + [ 1200 - ( 42 - 2 . 3 ) 3 ] : 40
= 205 + [1200 - (16 - 6)3 ] : 40
= 205 + [1200 - 1000] : 40
= 205 + 200 : 40
= 205 + 5
= 210
L. 500 - { 5 . [ 409 - ( 23 . 3 - 21 ) 2 ] + 103 } : 15
= 500 - {5 . [409 - (24 - 21)2 ] + 1000} : 15
= 500 - {5 . [409 - 9] + 1000}: 15
= 500 - {5.400+1000}:15
= 500 -3000:15
= 500 - 200
= 300.
Bài 2: Tính giá trị biểu thức
a, 38: 34+ 22. 23
b, 3 . 42- 2 . 32
c, 84 : 4 + 39: 37+ 50
d, 295 - ( 31 - 22 . 5)2
e, 500 - {5[409 - (23 . 3 - 21)2 ] + 103 } : 15
g, 53 . 2 - 100 : 4 + 23 . 5
h, 205 - [1200 - (42 - 2 . 3)3 ] : 40
a: \(3^8:3^4+2^2\cdot2^3\)
=81+32
=123
b: \(3\cdot4^2-2\cdot3^2\)
\(=48-18\)
=30
a, 38: 34+ 22. 23
= 38-4 + 22+3
= 34 + 25
= 81 + 32
= 113
b, 3 . 42- 2 . 32
= 3 . 16 - 2 . 9
= 48 - 18
= 30
c, 84 : 4 + 39: 37+ 50
= 84 : 4 + 32 + 1
= 84 : 4 + 9 + 1
= 21 + 9 + 1
= 31
d, 295 - ( 31 - 22 . 5)2
= 295 - ( 31 - 4 . 5 )2
= 295 - ( 31 - 20 )2
= 295 - 112
= 295 - 121
= 174
e, 500 - {5[409 - (23 . 3 - 21)2 ] + 103 } : 15
= 500 - {5[409 - (8 . 3 - 21)2 ] + 103 } : 15
= 500 - {5[409 - (24 - 21)2 ] + 103 } : 15
= 500 - {5[409 - 32 ]+ 103 } : 15
= 500 - {5[409 - 9 ]+ 103 } : 15
= 500 - {5 . 400 + 1000 } : 15
= 500 - {2000 + 1000} : 15
= 500 - 3000 : 15
= 500 - 200
= 300
g, 53 . 2 - 100 : 4 + 23 . 5
= 125 . 2 - 100 : 4 + 8 . 5
= 250 - 25 + 40
= 225 + 40
= 265
h, 205 - [1200 - (42 - 2 . 3)3 ] : 40
= 205 - [ 1200 - ( 16 - 2 . 3 )3 : 40
= 205 - [ 1200 - ( 16 - 6 )3 ] : 40
= 205 - [ 1200 - 103 ] : 40
= 205 - [ 1200 - 1000 ] : 40
= 205 - 200 : 40
= 205 - 5
= 200
Đây nha bạn!!!
a. 58.75 + 58.50 – 58.25 b. 20 : 2² – 59 : 58. c. (519 : 517 – 4) : 7
d. –84 : 4 + 39 : 37 + 50. e. 295 – (31 – 2².5)² f. 1125 : 1123 – 35 : (110 + 23) – 60
g. 29 – [16 + 3.(51 – 49)] h. 47 – (45.24 – 5².12) : 14 i. 10² – 60 : (56 : 54 – 3.5)
j. 2345 – 1000 : [19 – 2(21 – 18)²] k. 205 – [1200 – (4² – 2.3)³] : 40
ℓ. 500 – {5[409 – (2³.3 – 21)²] + 10³} : 15 m. 67 – [8 + 7.3² – 24 : 6 + (9 – 7)³] : 15
n. (–23) + 13 + (–17) + 57 o. (–123) + |–13| + (–7) p. |–10| + |45| + (–|–455|) + |–750|
q. –|–33| + (–15) + 20 – |45 – 40| – 57. h. 9.|40 – 37| – |2.13 – 52|