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quyenlyvangiang
2 năm trước
Bài 1: a/ Tìm tỉ số phần trăm của 2,4 và 96 b/ Tìm 15 % của 245kg c/ Tìm một số biết 25% của nó bằng 75 Bài 2: Tìm x a) 7/5- x = 3/10 b) 4/7 : x = 5/15 Bài 3: Một mảnh đất hình chữ nhật có chiều dài 60m, chiều rộng bằng chiều dài. Người ta dành 5% diện tích mảnh đất để làm nhà. Tính diện tích phần đất dành để làm nhà.
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