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 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

tong cua 3 so bang 621.biet tong cua so thu nhat va so thu 2 la 121.so thu 2 hon so thu nhat 21 d/v.tim so thu nhat

Cho mot phet cong cong co so hang thu nhat hon so hang thu hai la 15 don vi .Biet tong cua so hang thu nhat so hang thu hai va tong bang 682. Tim so hang thu hai cua tong 

tim tong cua 3 chu so biet so thu nhat la 27.so thu hai hon tbc cua ca ba so la 5 don vi.so thu ba kem tbc cua ca 3 so la 2 don vi

tong cua 3 so la621 .biet tong cua so thu nhat hon so thu ba 21 don vi .so thu 2 hon so thu nhat 21 don vi.tim so thu nhat

Tong ba so la 2068. Biet so thu hai lon hon tong cua so thu nhat va so thu ba la 124, so thu ba cong them 502 don vi thi bang so thu nhat. Tim ba so do

Tim ba so tu nhien biet tong cua ba so do bang 117. so thu nhat hon so thu hai 5 don vi va kem so thu ba 5 don vi

Tong cua ba so bang 188,75 . So thu nhat be hon tong hai so kia 17,35 don vi . Tim so thu ba biet so thu ba kem so thu hai 224,55 don vi