1 trung binh cua 3 so la 75. Neu them so 0 vào bên phải số thu 2 thi thi dc số thu nhat. Neu gap 4 lan so thu hai thi dc so thu 3. Tim 3 so do
bai 2 : tong hai so se thay doi nhu the nao neu so hang thu nhat tang them 28 don vi va so hang thu hai giam di 3 don vi?
Tong 2 so la 362.Neu lay so lon chia so be duoc thuong la 4 du 2 so lon ?
Tong 2 so la 792. 1 trong 2 so co tan cung la chu so 0.Neu xoa chu so 0 do di taduoc 2 so bang nhau .Tim 2 so
Tong cua 2 so la 308.them chu so 0 vao ben phai so be thi ta duoc so lon.Tim 2 so.
Thuc ra bai nay la toan lop 5 nen cac ban giai theo cach lop 5 gium minh nha.
Cam on nhieu.
Cau 1 : Trong mot cuoc thi co 20 cau hoi , moi cau tra loi dung duoc 10 diem , con sai thi tru 3 diem . 1 hs dat duoc 148 diem . Hoi ban ay tra loi duoc bao nhieu cau dung , bao nhieu cau sai Cau 2 : Tim so bi chia , so chia cua mot phep chia biet rangthuong = 3 va so du = 2 . Tong cua so bi chia , so chia , so du = 76 Cau 3 : Tich cua 2 so la 1692 , neu them 4 dv vao mot thua so thi tich moi la 1880 . Tim 2 so do Co ai biet lam thi chi minh voi
Ai biet thi giup minh voi nha
Cau hoi la :tim so tu nhien co 5 chu so biet rang neu viet them chu so 2 vao dang sau so do thi duoc so lon gap 3 lan so co duoc bang cach viet them chu so 2 vao dang truoc so do
[ ai lam dung minh se tich cho]
Tong mot STP va mot STN la 358,4. Biet rang neu bo chu so 0 o tan cung STN thi hieu cua STN va STP la 15,6 . Tim 2so do ?
STN = so tu nhien. STP = so thap phan
Tong 2 so la 306 .Lay so lon chia cho so be thi ta duoc thuong la 4 du 26.Tim 2 so do .
giai theo cach lop 5 thi minh moi tich do nha