
TRƯỜNG THCS NGUYỄN HIỀN
Họ, tên HS: …………………….....................................
Lớp: 9/…………
KIỂM TRA CUỐI HỌC KỲ I
Năm học: 2024 - 2025
MÔN TOÁN LỚP 9
Thời gian làm bài: 90 phút
(Không kể thời gian giao đề)
ĐIỂM
ĐỀ CHÍNH THỨC MÃ ĐỀ A
(Đề gồm có 2 trang)
I. TRẮC NGHIỆM (3,0 điểm) Chọn phương án trả lời đúng trong các câu sau:
Câu 1. Hệ Phương trình nào dưới đây là hệ phương trình bậc nhất hai ẩn
A.
1
3;
x y
y z
+ =
+ = −
B.
2
2 3
1;
x y
x y
+ =
− = −
C.
1
2 1;
x y
y
− + =
=
D.
2
0 0 0.
x y
x y
− =
+ =
Câu 2. Nghiệm của bất phương trình -2x + 1 > 0 là:
A. x < 0,5 B. x > 0,5 C. x > -0,5 D. x < -0,5
Câu 3. Cho tam giác ABC vuông tại A,
, ,BC a AC b AB c= = =
cosB bằng
A.
010009000003280300000000ff02000000000400000003010800050000000b0200000000050000000c0
21a000800030000001e0004000000070104000400000007010400ff020000410b2000cc0025000a0000
0000001900070000000000280000000a00000025000000010008000000000000000000000000000000
0000000000000000000000000000ffffff0066b6db00003a3a00b6660000ffffdb003a90db003a000000db
b69000db903a0066b6ff00ffb666000066b600903a0000b6ffff0000006600ffdbdb00dbffff00003a90003
a90b600b6663a0090dbff00003a6600db9066003a003a00ffdb900066000000dbffb6003a669000ffffb60
0663a000090666600ffdbb60000003a003a0066003a6666000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000000000000000000