VIET NAM / ARE / SEASONS / IN / FOUR / OF / NORTH / THE/ ( Thêm There câu sẽ hợp lí hơn)
=> There are Four seasons in the north of Viet Nam
FOR / GOOD / MORNING / IS / HEALTH / YOUR / EXERCISE / DOING
=> Doing morning exercise is good for your health
BÀI 1:TÍNH
1873463-4763=?
98263+547257=?
1 GIỜ=? PHÚT
9 PHÚT=? GIỜ