205[1200-(42-2.3)3]:40
Thực Hiện Phép Tính Một Cách Hợp Lý Nếu Có Thể:
1)135+360+65+24+40
2)8.4.125.25
3)5.23-18:32
4)467+238+533+762+3465
5)129.172-73.129+129
6)205-[1200-(42-2.3)3]:40
1)...=135+65+360+40+24=200+400+24=624
2)...=(8.125).(4.25)=1000.100=100000
4)...= (467+433)+(238+762)+3465=990+1000+3465=5455
5)...=129.(172-73+1)=129.100=12900
6)...=205-(1200-(16-6)3):40=205-(1200-1000):40=205-200:40=205-5=200
tính nhanh:
205- [1200-(4 mũ 2 - 2.3) mũ 3 ] :40
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
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
205-[1200-(42-2.3)3]:40
mọi người giúp với nhé! mai nộp rồi
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
=205-50
=155
Nhớ thk nha bạn
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
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!!!
Thực hiện các phép tính sau:
a) 107-{38+[7.3^2-24:6+(9-7)^3]}:15
b) 307-[(180-160):2^2+9]:2
c)205-[1200-(4^2-2.3)^3]:40
d)177:[2.(4^2-9)+3^2(15-10)]
e)[(25-2^2.3)+(3^2.4+16)]:5
Cau a la ban hay tinh trong dau ngoac don truoc sau do lam nhoac vuong va lam dau ngoac nhon va tinh cac phep tinh con lai
e)
=[(25-4.3)+(9.4+16)}:5
=[(25-12)+(36+1)]:5
=[13+52]:5
=65:5
=13
d)
=177:[2.(16-9)+9.5]
=177:[2.7+45]
=177:[14+45]
=177:59
=3
c)
=205-[1200-(16-6)3]:40
=205-[1200-103]:40
=205-[1200-1000]:40
=205-200:40
=205-5
=200
b)
=307-[20:4+9]:2
=307-[5+9]:2
=307-14:2
=307-7
=300
a)
=107-{38+[7.9-4+23]}:15
=107-{38+[63-4+8]}:15
=107-{38+[59+8]}:15
=107-{38+67]}:15
=107-105:15
=107-7
=100
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
Tick nha bạn
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
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