ai làm nhanh tớ sẽ vote 5* Bài 12: Lớp 6A có 45 học sinh, khi được hỏi về sở thích ẩm thực thì có đến số học sinh lớp thích ăn pizza, số học sinh còn lại thích món gà rán. a/ Tính số học sinh thích ăn pizza của lớp. b/ Số học sinh thích ăn gà rán chiếm bao nhiêu phần trăm số học sinh của lớp. Bài 13. Viết phân số dưới dạng số thập phân và dùng kí hiệu % Bài 14. Tìm các số tự nhiên x, y sao cho: Bài 15: Chứng minh rằng phân số tối giản với mọi

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