2011+5.[50-(7-17)²]
=2011+5.[50-(-10)²]
=2011+5.[50-100]
=2011+5.(-50)
=2011+(-250)
=1761
.Thực hiện phép tính
a) 47 – [(45.24 – 5 2 .12):14]
b) 50 – [(20 – 2 3 ) : 2 + 34]
c) 102 – [60 : (56 : 54 – 3.5)]
d) 50 – [(50 – 2 3 .5):2 + 3]
e) 10 – [(82 – 48).5 + (23 .10 + 8)] : 28
f) 8697 – [37 : 35 + 2(13 – 3)]
g) 2011 + 5[300 – (17 – 7)2 ]
h) 695 – [200 + (11 – 1)2 ]
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
i) 129 – 5[29 – (6 – 1)2 ]
j) 2010 – 2000 : [486 – 2(72 – 6)]
s) 125(28 + 72) – 25(32 .4 + 64)
t) 500 – {5[409 – (23 .3 – 21)2 ] + 103 } : 15
47-[(45.2^4-5^2.12):14]
50-[(20-2^3):2+34]
10^2-[60:(5^6:5^4-3.5)]
50-[(50-2^3.5):2+3]
10-[(8^2-48).5+(2^3.10+8)]:28
8697-[3^7,3^5+2(13-3)]
2011+5[300-(17-7^2)]
695-[200+(11-1^2)]
129-5[29-(6-1^2)]
2010-2000:486-2(7^2-6)]
Tính:
B = 1*2+2*3+3*4+...+2011*2012
C =1*50+2*49+3*48+...+49*2+50*1
D = 4*7+7*10+10*13+...+205*208
E = (2+4+6+8+..+2014)-(3+5+7+9+...+2011)
giúp em bài này luôn ạ
e) 2011 + 5[300 – (17 – 7)2 ]
tính
2011+5[300-(17-7)mũ 2]
a) 47 – [(45.24 – 52.12):14] b) 50 – [(20 – 23) : 2 + 34] c) 102 – [60 : (56 : 54 – 3.5)] d) 50 – [(50 – 23.5):2 + 3] e) 10 – [(82 – 48).5 + (23.10 + 8)] : 28 f) 8697 – [37 : 35 + 2(13 – 3)] g) 2011 + 5[300 – (17 – 7)2] h) 695 – [200 + (11 – 1)2] i) 129 – 5[29 – (6 – 1)2] tính nhanh
|
Thực hiện phép tính:
a. (-17)+5+8+17+( -3 )
b. (5 mũ 19/ 5 mũ 17+3 ) / 7
c.| -8 |+(-5) +9+(-7) +| -4|
d.1-2+3-4+...+2011-2012
tính hợp lý
2011+5[300-(17-7)2
1 . 47 - [(45 . 2^4 - 5^2 . 12) : 14 ] 9 . 129 - 5 [29 - (6-1)^2]
2 . 50 - [( 20 - 2^3 ) : 2 + 34 ]
3 . 10^2 - [ 60 : ( 5^6 : 5^4 - 3 . 5)]
4 . 50 - [( 50 - 2^3 . 5 ) : 2 + 3 ]
5 . 10 - [( 8^2 - 48 ) . 5 + (2^3 . 10 + 8 )] : 28
6 . 8697 - [ 3^7 : 3^5 + 2(13 - 3)]
7 . 2011 +5 [300 - ( 17 - 7)^2]
8 . 695 - [ 200 + ( 11 - 1 )^2]ư
