Cau 1: Mot truong tieu hoc co 567 hoc sinh,so hoc sinh nam bang 2/3 so hoc sinh nu.Hoi truong do co bao nhieu hoc sinh nam,bao nhieu hoc sinh nu?
Cau 2: Mot thua ruong hinh chu nhat co chu vi la 350m,chieu rong bang 3/4 chieu dai.Tinh dien tich thua ruong hinh chu nhat do.
Cau 3: Ting gia tri cua bieu thuc:
a) (5/3 - 4/5) nhan 3/2 b) 3/2 + 3/4 : 2/3
Cau 4: Tinh bang cach thuan tien nhat.
a) 1/5 + 4/11 + 4/5 + 7/11 b) 27 nhan 45 - 23 nhan 27 - 27 nhan 11