Arithmetic Operator Puzzles

#241: 1 _ 5 _ 3 _ 9 = 15 hard #242: 1 _ 5 _ 4 _ 8 = 11 medium #243: 1 _ 5 _ 4 _ 2 = -9 easy #244: 1 _ 5 _ 4 _ 8 = -9 hard #245: 1 _ 5 _ 4 _ 2 = 10 easy #246: 1 _ 5 _ 5 _ 5 = 4 easy #247: 1 _ 5 _ 6 _ 2 = 16 medium #248: 1 _ 5 _ 6 _ 3 = 11 easy #249: 1 _ 5 _ 6 _ 3 = -9 medium #250: 1 _ 5 _ 6 _ 3 = 7 easy #251: 1 _ 5 _ 6 _ 6 = 4 easy #252: 1 _ 5 _ 6 _ 2 = 15 medium #253: 1 _ 5 _ 6 _ 3 = 10 easy #254: 1 _ 5 _ 7 _ 7 = 4 easy #255: 1 _ 5 _ 8 _ 4 = 11 medium #256: 1 _ 5 _ 8 _ 4 = -9 hard #257: 1 _ 5 _ 8 _ 2 = 9 medium #258: 1 _ 5 _ 8 _ 4 = 7 easy #259: 1 _ 5 _ 8 _ 2 = 1 easy #260: 1 _ 5 _ 8 _ 4 = 3 easy #261: 1 _ 5 _ 8 _ 8 = 4 easy #262: 1 _ 5 _ 8 _ 2 = 20 hard #263: 1 _ 5 _ 9 _ 3 = 16 hard #264: 1 _ 5 _ 9 _ 9 = 4 easy #265: 1 _ 5 _ 9 _ 3 = 15 hard #266: 1 _ 6 _ 2 _ 3 = -3 easy #267: 1 _ 6 _ 2 _ 3 = 4 easy #268: 1 _ 6 _ 2 _ 1 = 2 easy #269: 1 _ 6 _ 2 _ 2 = 1 easy #270: 1 _ 6 _ 2 _ 4 = 7 easy #271: 1 _ 6 _ 2 _ 5 = 15 medium #272: 1 _ 6 _ 2 _ 6 = 9 easy #273: 1 _ 6 _ 2 _ 6 = -3 easy #274: 1 _ 6 _ 2 _ 7 = 10 medium #275: 1 _ 6 _ 2 _ 8 = -5 medium #276: 1 _ 6 _ 2 _ 9 = 12 hard #277: 1 _ 6 _ 2 _ 9 = -6 medium #278: 1 _ 6 _ 3 _ 2 = 10 easy #279: 1 _ 6 _ 3 _ 9 = 3 easy #280: 1 _ 6 _ 3 _ 4 = 9 easy #281: 1 _ 6 _ 3 _ 5 = 11 easy #282: 1 _ 6 _ 3 _ 7 = 15 hard #283: 1 _ 6 _ 3 _ 2 = -8 medium #284: 1 _ 6 _ 3 _ 9 = -1 easy #285: 1 _ 6 _ 3 _ 4 = -7 easy #286: 1 _ 6 _ 3 _ 2 = 9 easy #287: 1 _ 6 _ 3 _ 9 = 2 easy #288: 1 _ 6 _ 3 _ 1 = 1 easy