Tong cua hai so bang 621.biet tong cua so thu nhat va so thu hai hon so thu ba la 121 doi vi.so thu hai hon so thu nhat 21 don vi. Tim so thu nhat.

Tong cua ba so tu nhien la 1993. So thu nhat lon hon tong cua hai so Kia la 57. Neu not o so thu hai 36 don vi thi so thu hai bang so thu ba . Tim moi so da cho ? 

trung binh cong cua ba so la 25,42.tong cua so thu nhat va so thu haiva so thu ba la 58,5.biet so thu ba hon so thu nhat la 7,4.tim ba so do

1.tong cua ba so la 615.biet so thu hai hon so thu nhat 30 don vi nhung lai kem so thu ba 15 don vi.

  Vay so thu nhat la:

2.Tong cua hai so la 222. biet rang neu cung them vao moi 9 don vi thi so lon se gap doi so be. So lon la:

3.{2012nhan 99-1006nhan 18} nhan 2013=

Tong cua ba so la so lon nhat co ba chu so. Neu lay so thu nhat chia cho so thu hai thi duoc thuong la 5, du 3. So thu nhat hon tong cua hai so kia la 7 don vi. So thu nhat hon so thu hai la ?

Tong cua bon so tu nhien la so lon nhat co bay chu so. Neu xoa di chu so hang don vi cua so thu nhat thi duoc so thu hai. So thu ba bang hieu cua so thu nhat va so thu hai. So thu nhat la tich cua so be nhat co ba chu so va so lon nhat co bon chu so. Tim so thu tu.

Tong cua 3 so la 1978. So thu nhat hon tong hai so kia la 58 don vi. Neu bot o so thu hai di 36 don vi thi so thu hai se bang so thu ba. Tim 3 so do.

tong cua 3 so bang 621 biet tong cua so thu nhat va so thu hai hon so thu ba 121 don vi so thu hai hon so thu nhat 21 don vi tim so thu hai

trung binh cong cua ba so la 13,5. biet tong cua so thu nhat va so thu hai la 29,1. tong cua so thu hai va so thu ba la 24,7. hay tim ba so do.