1+1+2+2+3+3+4+4+5+5+6+6+7+7+8+8+9+9 eching

$$1+1+2+2+3+3+4+4+5+5+6+6+7+7+8+8+9+9$$

Baholash

$$90$$

Yechim qadamlari

2 olish uchun 1 va 1'ni qo'shing.

$$2+2+2+3+3+4+4+5+5+6+6+7+7+8+8+9+9$$

4 olish uchun 2 va 2'ni qo'shing.

$$4+2+3+3+4+4+5+5+6+6+7+7+8+8+9+9$$

6 olish uchun 4 va 2'ni qo'shing.

$$6+3+3+4+4+5+5+6+6+7+7+8+8+9+9$$

9 olish uchun 6 va 3'ni qo'shing.

$$9+3+4+4+5+5+6+6+7+7+8+8+9+9$$

12 olish uchun 9 va 3'ni qo'shing.

$$12+4+4+5+5+6+6+7+7+8+8+9+9$$

16 olish uchun 12 va 4'ni qo'shing.

$$16+4+5+5+6+6+7+7+8+8+9+9$$

20 olish uchun 16 va 4'ni qo'shing.

$$20+5+5+6+6+7+7+8+8+9+9$$

25 olish uchun 20 va 5'ni qo'shing.

$$25+5+6+6+7+7+8+8+9+9$$

30 olish uchun 25 va 5'ni qo'shing.

$$30+6+6+7+7+8+8+9+9$$

36 olish uchun 30 va 6'ni qo'shing.

$$36+6+7+7+8+8+9+9$$

42 olish uchun 36 va 6'ni qo'shing.

$$42+7+7+8+8+9+9$$

49 olish uchun 42 va 7'ni qo'shing.

$$49+7+8+8+9+9$$

56 olish uchun 49 va 7'ni qo'shing.

$$56+8+8+9+9$$

64 olish uchun 56 va 8'ni qo'shing.

$$64+8+9+9$$

72 olish uchun 64 va 8'ni qo'shing.

$$72+9+9$$

81 olish uchun 72 va 9'ni qo'shing.

$$81+9$$

90 olish uchun 81 va 9'ni qo'shing.

$$90$$

Omil

$$2\times 3^{2}\times 5$$