tong cua 3 so la 615 biet so thu 2 hon so thu nhat 30 don vi nhung lai kem so thu 3 15 don vi . tim so thu nhat

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 3 so la 615 . so thu hai hon so thu nhat 30 don vi .nhung kem so thu ba 15 don vi . tim so thu nhat 

tong cua 3 so bang 615.biet so thu hai hon so thu nhat 30 d/v nhung lai kem so thu 3 15d/v.tim so thu nhat

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

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 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.

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

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