Kiểm tra một tiết chương II lớp: 6 môn: Số học

Trường THCS Xuân Áng KIỂM TRA MỘT TIẾT CHƯƠNG II
Lớp: 6____ Môn: Số học
Họ và tên:_________________________________
 Điểm
 Lời phê của thầy (cô) giáo
ĐỀ BÀI (đề 1)
Câu 1 (3đ): Trong các số sau: 4; 28; 125; 756; 1010; 2475; 7856; 9615. 
 a) Số nào chia hết cho 2? b) Số nào chia hết cho 5?
 c) Số nào chia hết cho 9? 
Câu 2 (2đ): Không làm phép chia, hãy xem:
 A = 342 + 5013 + 720 có chia hết cho 9 không? Tại sao?
Câu 3 (3đ): Cho hai số 12 và 15
 a) Phân tích mỗi số ra thừa số nguyên tố .
 b) Tìm ƯCLN của hai số trên .
 c) Tìm BCNN của hai số trên . 
Câu 4 (2đ): Tìm số tự nhiên x, biết rằng: x 42, x 35 và 300 < x < 500.
BÀI LÀM
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Trường THCS Xuân Áng KIỂM TRA MỘT TIẾT CHƯƠNG II
Lớp: 6____ Môn: Số học
Họ và tên:_________________________________
 Điểm
 Lời phê của thầy (cô) giáo
ĐỀ BÀI (đề 2)
Câu 1 (3đ): Trong các số sau: 14; 26; 135; 756; 1010; 2070; 7856; 8325. 
 a) Số nào chia hết cho 2? b) Số nào chia hết cho 5?
 c) Số nào chia hết cho 9? d) Số nào chia hết cho 15?
 e) Số nào chia hết cho cả 2, 3 5 và 9
Câu 2 (2đ): Không làm phép chia, hãy xem:
 A = 351 + 1413 + 3420 có chia hết cho 9 không? Tại sao?
Câu 3 (3đ): Cho hai số 24 và 60
 a) Phân tích mỗi số ra thừa số nguyên tố .
 b) Tìm ƯCLN của hai số trên .
 c) Tìm BCNN của hai số trên . 
Câu 4 (2đ): Tìm số tự nhiên x, biết rằng: x 42, x 35 và 300 < x < 500.
BÀI LÀM
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