10-10:10+10•10

109

Explanation (using: ":" = division, "•" = multiplication):

• 10 ÷ 10 = 1
• 10 × 10 = 100
• Then 10 − 1 + 100 = 9 + 100 = 109

If you intended different grouping (parentheses), let me know and I’ll recalc.