CÓ ít nhất  ( 30 + 40 ) - 53 = 17 ( học sinh )

50L dầu nặng số kg là : 0,72 x 50 = 36 (kg)

Co : (200-100):4+1=26 (so chia het cho 2 va 4)

Co : (200-100):2+1=51 (so chia het cho 2)

Co : 51-26=25 (so chia het cho 2 nhung khong chia het cho 4)

Hello every one, my name is Trinh. I am a student in class 7A at Đuc Hiep lower secondary school. I'm twelve years old. My hobbies are watching cartoon, reading book, playing board game, ... My favourite subject are Maths, Vietnamese, English, Art, ... There are 4 member in my family : my mother, my father and young brother. My mother name is Hang, she is a farmer, she is thirty - seven years old. My father name is Vuong, he is a farmer too, he is thirty - nine years old. And my young brother is Trieu, he is a student in class 4B at Đuc Hiep primary school.