tinh gia tri bieu thuc:
-1-2+3+4-5-6+7+8-9-10+11+12-...-2013-2014+2015+2016
Tinh gia tri bieu thuc: C = 1 - 3 + 5 - 7 + ........................+ 2013 - 2015 + 2017
Tinh hop ly gia tri cac bieu thuc sau
c) \(6\frac{5}{12}:2\frac{3}{4}+11\frac{1}{4}.\left(\frac{1}{3}-\frac{1}{5}\right)\)
d) \(\left(\frac{3}{5}+0,415-\frac{3}{200}\right).2\frac{2}{3}.0,25\)
tinh nhanh gia tri cac bieu thuc sau
a , 1/ 2+ 1 /3 + 1 / 4 + 1/ 6
b, 53 / 4 . 11/ 16 - 23/4 . 11/16
c, 3/ 8 . ( 2 /9 + 4 /15 )
Tim so nguen x sao cho cac bieu thuc sau co gia tri nho
a)A=(x-1)2+2014
b)B=/x+4/+2014
c)C=\(\frac{5}{x-2}\)
d)D=\(\frac{x+5}{x-4}\)
tinh gia tri cua cac bieu thuc sau roi so sanh cac ket qua tinh duoc
(-25)-(-12), 18+(14-42), (-18)-13+17
tinh gia tri bieu thuc
A=5.(x-y) voi x=-4,y=2
B=a.(b+c)-b(a-c)
với a+b=-5 va c=10
tinh gia tri bieu thuc B =1^2/2^2-1.3^2/4^2-1....2013^2/2014^2-1
Tinh gia. Tri cua bieu thuc sau
A,a+(+62) voi a=123
B,(-75) +b voi b =-325
C, |-326|+c voi c=-56
D,-135+d voi |d|=35
So nguyen. Nha
