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Đăng có nhiều hơn Tuấn 67 viên bi. Sau khi Đăng cho Tuấn một số viên bi thì Đăng có it hơn Tuấn 8 viên bi. Hỏi Đăng cho Tuấn bao nhiêu viên bi ?

Các bạn hãy giúp mình đi ! 

Vì giữa chúng có hai số chẵn nên số số chẵn là: 2 + 1  =  3

Hiệu hai số là: 2 $\times$ ( 3 - 1) = 4

Ta có sơ đồ: 

Theo sơ đồ ta có:

Số chẵn lớn là: (76+4):2 = 40

Số chẵn lớn là: 40  - 4 = 36

Đáp số: số chẵn bé 36

              số chẵn lớn 40

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45% + 45% x 2 = 135%

6742 : 7 = 963 ( dư 1 )

66666666666666666 : 3 = 22222222222222222

206631 : 6 = 34438 ( dư 3 )