Các câu hỏi tương tự
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)]
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 )] : 286 . 8697 - [ 3^7 : 3^5 + 2(13 - 3)]7 . 2011 +5 [300 - ( 17 - 7)^2]8 . 695 - [ 200 + ( 11 - 1 )^2]ư
Đọc tiếp
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
A=1-2+3+4-5-6+7+8-9-...+2007+2008-2009-2010
B=-1-2+3+4-5-6+7+8-9-10+11+12-...-2013-2014+2015+2016
C=(2+4+6+8+...+2014)-(3+5+7+9...+2011)
B=1+2-3-4+5+6-7-8+9+10-...+48+49+50-51(gồm 51 số hạng)
Tìm B.
Tính nhanh:
1 - 2 + 3 - 4 + 5 -6 + ... - 48 + 49 - 50 +51
1+ 2 -3 -4 +5 +6 -7 -8 + 9 +10 -11 -12 + ... +301 + 302
giải rõ giúp mik nha
S-1+2+3-4-5+6+7+8-9-10+11+12+13-14-15+...+2011+2012+2013-2014-2015
(Tính)
1/2×(2×x-3)+105/2=-137/2 A,-12×25-25×75-25×13 B,-50/7×49/10-35/2×-10/7+ -25/3× -9/5 C,-354+265-156+125 D,-74+40-50+16-35 E,-2/3×4/5+-4/5×4/3-0,125
tính các tổng sau
A=1*2+2*3+3*4+4*5+5*6+6*7...+49*50
B=1*50+2*49+3*48+...+49*2+50*1
S-1+2+3-4-5+6+7+8-9-10+11+12+13-14-15+...+2011+2012+2013-2014-2015
(Đề bài tính)