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nguyenhuutrung
2 năm trước
Câu 1: a. Có tất cả bao nhiêu cách viết số 34 dưới dạng tổng của hai số nguyên tố? Trả lời:……cách. b. Có……số vừa là bội của 3 và là ước của 54 Số các ước tự nhiên có hai chữ số của 45 là Câu 2: Câu A. Khi chia một số tự nhiên cho 4 được số dư là 2. Số dư trong phép chia số tự nhiên đó cho 2 là Câu B: Một lớp học có 40 học sinh chia thành các nhóm, mỗi nhóm nhiều nhất 6 học sinh. Hỏi số nhóm ít nhất có thể là Câu C: Cho hình chữ nhật ABCD có chiều dài là 12cm, chiều rộng là 8cm. Diện tích hình tam giác ABC là Câu D: Trong một phép chia, nếu ta gấp đôi số chia thì thương của phép chia cũ gấp lần so với thương của phép chia mới.
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