TRƯỜNG THCS NGƯ LỘC
ĐỀ THI CHỌN ĐỘI TUYỂN HỌC SINH GIỎI LỚP 6
NĂM HỌC 2010 - 2011
Môn : Toán
Thời gian làm bài 150 phút
Trêng THCS Ng Léc - Líp : ..............
Hä tªn:....................................................
Gi¸m thÞ 1: ......................................
Gi¸m thÞ 2: ......................................
Sè ph¸ch
§iÓm b»ng sè:
.......................
§iÓm b»ng ch÷:
......................................
Hä tªn ngêi chÊm thi
..........................................................
Sè ph¸ch
Bài 1 : (5 điểm) Thực hiện các phép tính sau một cách hợp lý :
a)
( ) ( )
2 2 2 2 2
10 11 12 : 13 14+ + +
.
b)
2
1.2.3...9 1.2.3...8 1.2.3...7.8− −
c)
( )
2
16
13 11 9

.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................