Question

1+2+3+4+5+6+7+8+9+9+8+7+6+5+4+3+2+1​

Answer 1

Answer:

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

$\huge\underline\red{Answer \ = \ 90}$......

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Answer 2

Answer:

Answer: 90

Step-by-step explanation:

1+2+3+4+5+6+7+8+9+9+8+7+6+5+4+3+2+1 =90