Question

1+2+3+4+5+6+7+8+9+1+2+3+4+5+6+7+7×8+9+9=​

Answer 1

Step-by-step explanation:

$1+2+3+4+5+6+7+8+9+1+2+3+4+5+6+7+7×8+9+9 \\ = 80 \times 26 \\ = 2080$