Matchstick Puzzles

#433: Fix 1-1=8 medium #434: Fix 9-8=77 hard #435: Fix 5-7=72 hard #436: Fix 7+1=74 hard #437: Fix 4+3=9 easy #438: Fix 7+5=13 medium #439: Fix 6+4=72 hard #440: Fix 9+9=79 hard #441: Fix 1+1=3 easy #442: Fix 7+9=9 medium #443: Fix 9+8=10 medium #444: Fix 3-8=9 hard #445: Fix 9-0=8 hard #446: Fix 5+4=6 easy #447: Fix 4-5=1 easy #448: Fix 6-8=12 hard #449: Fix 0+5=73 hard #450: Fix 2+7=10 easy #451: Fix 8-2=18 hard #452: Fix 2+6=9 easy #453: Fix 7+5=1 medium #454: Fix 8+2=5 hard #455: Fix 3+9=3 easy #456: Fix 4-2=3 easy #457: Fix 0-8=0 hard #458: Fix 1+6=8 medium #459: Fix 2-9=17 hard #460: Fix 9+2=2 easy #461: Fix 2+9=2 easy #462: Fix 6-4=70 hard #463: Fix 0-4=5 easy #464: Fix 3-2=6 medium #465: Fix 1-6=2 medium #466: Fix 5+1=5 medium #467: Fix 7-1=2 medium #468: Fix 7+0=9 medium #469: Fix 6+1=10 easy #470: Fix 5+3=3 medium #471: Fix 5+5=1 medium #472: Fix 6+3=3 easy #473: Fix 6+7=7 easy #474: Fix 5-0=8 medium #475: Fix 1-9=70 hard #476: Fix 4+0=72 hard #477: Fix 3-9=72 hard #478: Fix 6+1=12 medium #479: Fix 7-9=76 hard #480: Fix 0+2=18 medium