Tuổi ông và tuổi cháu cộng lại là 92 tuổi ông hơn cháu 64 tuổi hỏi ông bao nhiêu tuổi cháu bao nhiêu tuổi

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Tuổi ông là:

   $(92+64):2=78$ (tuổi)

Tuổi cháu là:

    $92-78=14$ (tuổi)

                    Đáp số: Ông 78 tuổi

                                   Cháu 14 tuổi

Đáp án: Giải theo phương pháp tìm 2 số biết tổng và hiệu của 2 số.

Giải thích các bước giải: Tuổi của ông: (92+64)/2=78t. Tuổi của cháu: 92-78=14t

Câu hỏi trong lớp Xem thêm

This is John . He’s a teacher. He’s old and a little fat. He has short black hair. He works at the school. He teaches English. Every day he gets up at half past six in the morning. He takes a shower and puts on a shirt and tie. Then he eats breakfast at seven o’clock. At half past seven, he rides his motorcycle to school. Tony starts work at eight o’clock. He cleans the classroom. Then, he talks with his students’ parents. He starts teaching at nine o’clock. At twelve o’clock, he eats lunch. He teaches again in the afternoon. He goes home at half past four. In the evening, he feeds his goldfish and he watches TV. He eats dinner at half past six. Then he corrects students’ homework. At ten o’clock, he goes to bed. 1. What’s his name? …………………………………………………………………….. 2. What does he look like ? …………………………………………………………………….. 3. What time does he get up ? …………………………………………………………………….. 4. What time does he eat breakfast ? …………………………………………………………………….. 5. What time does he go home ? …………………………………………………………………….. 6. What time does he eat dinner? …………………………………………………………………….. 7. What time does he go to bed? …………………………………………………………………….. 8. What does he do in the evening ? ……………………………………………………………………..

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