cau 1 ;2 so co tong la 346 biet so be la so co hai chu so va khi viet them chu so 3 vao truoc so be thi duoc so lon tim so be

cau 2 ; tong 2 so la 390 so be l¸o co 2 chu so va neu viet them chu so 3 vao truoc so be thi duoc so lon tim so lon

cau3;chu vi 1 khu dat hinh chu nhat =68 chieu dai hon chieu rong16m nguoi ta trong rau tren khu dat do TB cu 2m vuong trong duoc 2 kg rau tinh so rau o khu dat do

cau4 ; TBCcua 2 so la so nho nhat co 3chu so khac nhau biet so lon lon hon TBCcua 2so la 24 don vi tim so be va so lon 

Bai 1 : Tong cua hai so la 2000. Neu so hang thu nhat them 135 don vi va so hang thu hai bot 531 don vi thi duoc tong moi la bao nhieu?

Bai 2 : Tim tong hai so biet rang neu so hang thu nhat bot di 246 don vi va so hang thu hai them 642 don vi thi duoc tong moi bang 2010.

Bai 3 : Hieu cua hai so  la 1000. Neu so lon them 235 don vi va so be bot 200 don vi thi duoc hieu moi la bao nhieu?

Bai 4 : Hieu cua hai so bang 1234. Neu so lon bot 234 don vi va so be them 456 don vi thi duoc hieu moi la bao nhieu?

Bai 5 ; Tim hieu cua hai so, biet rang so lon va so be cung bot di 100 don vi thi duoc hieu moi la 1000.