Bai1:Tim y:
a} {1/4*y-1/8}*3/4=1/4
Bai2:Tinh nhanh tong cua 150 so le lien tiep dau tien .
Bai3:Cua hang ban mot so gao.Sang cua hang ban 2/9so gao;chieu ban 3/7 so gao.So gao ban buoi sang kem buoi chieu 650kg gao.Hoi tong so gao luc cua hang chua ban la bao nhieu kg?Sang;chieuban bao nhieu kg gao?
*Bai4:Tinh tong cua cac so co 2 chu so khac nhau.