Matchstick Puzzles

#481: Fix 7-2=4 easy #482: Fix 8+6=5 medium #483: Fix 9-0=3 easy #484: Fix 4+9=72 hard #485: Fix 1-6=6 medium #486: Fix 5-2=5 easy #487: Fix 0-1=7 medium #488: Fix 3+1=3 easy #489: Fix 6-6=9 easy #490: Fix 8-2=11 hard #491: Fix 0+1=10 easy #492: Fix 5+7=13 medium #493: Fix 8+1=6 easy #494: Fix 7-5=3 easy #495: Fix 3+9=9 easy #496: Fix 0+2=8 easy #497: Fix 7+6=1 medium #498: Fix 6+2=1 medium #499: Fix 9+6=9 easy #500: Fix 4+9=10 easy #501: Fix 8-2=2 hard #502: Fix 3+7=9 easy #503: Fix 8-3=9 hard #504: Fix 7+0=75 hard #505: Fix 9+3=11 easy #506: Fix 4-8=4 hard #507: Fix 7+8=1 medium #508: Fix 9+1=2 hard #509: Fix 9-8=18 hard #510: Fix 5-6=5 easy #511: Fix 0-2=7 easy #512: Fix 8-8=76 hard #513: Fix 7-9=18 hard #514: Fix 5-9=74 hard #515: Fix 9+1=1 easy #516: Fix 0+2=11 easy #517: Fix 0+9=18 medium #518: Fix 3+0=17 medium #519: Fix 5-6=17 hard #520: Fix 6-9=14 hard #521: Fix 1+6=10 easy #522: Fix 8-6=15 hard #523: Fix 8-0=1 medium #524: Fix 9+7=10 easy #525: Fix 6+9=12 medium #526: Fix 1+9=76 hard #527: Fix 8+8=10 easy #528: Fix 0+6=13 medium