Bài làm:
Để a - b = 5
=> a = 5; 6; 7; 8; 9
b = 0; 1; 2; 3; 4
Để a785b chia hết cho 9
Ta có: 7 + 8 + 5 = 20
=> a = 7; b = 0
hoặc a = 6; b = 1
hoặc a = 5; b = 2
hoặc a = 4; b = 3
hoặc a = 3; b = 4
hoặc a = 2; b = 5
hoặc a = 1; b = 6
Để a - b = 5 và a785b chia hết cho 9
=> a = 6 hay 5
b = 1 hay 2
tóm lược tiểu sử và hoạt động của 2 cụ Phan và Bác Hồ. Nêu điểm giống và khác. Điểm mới trong con đường cứu nước của Bác
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cho mình hỏi có bạn nào có làm bài thuyết trình lịch sử 9 bài 6 các nước châu phi ko ạ. nếu có thì cho mình xin mẫu đi ạ.
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