An có 20 nhản vở bình có 20 nhản vở lan có số nhảm vở kém trung bình cộng của 3 bạn là 6 nhản vở. Hỏi lan có bao nhiêu nhản vở?

2 câu trả lời

Trung bình cộng số nhãn vở của An và Bình là:

$(20+20):2=20$(nhãn vở).

Số nhãn vở Lan có là:

$20-6=14$(nhãn vở).

Đáp án: bạn viết đề sai chúc bạn học tốt

Giải thích các bước giải:

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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