Arithmetic Operator Puzzles

#1249: 3 _ 5 _ 3 _ 5 = 1 easy #1250: 3 _ 5 _ 4 _ 8 = 13 hard #1251: 3 _ 5 _ 4 _ 2 = -7 easy #1252: 3 _ 5 _ 4 _ 8 = -7 medium #1253: 3 _ 5 _ 5 _ 5 = 16 medium #1254: 3 _ 5 _ 5 _ 5 = 14 medium #1255: 3 _ 5 _ 6 _ 3 = -7 easy #1256: 3 _ 5 _ 6 _ 6 = 16 medium #1257: 3 _ 5 _ 6 _ 6 = 14 medium #1258: 3 _ 5 _ 6 _ 9 = 10 medium #1259: 3 _ 5 _ 6 _ 8 = 20 hard #1260: 3 _ 5 _ 7 _ 7 = 16 hard #1261: 3 _ 5 _ 7 _ 7 = 14 medium #1262: 3 _ 5 _ 8 _ 4 = -7 medium #1263: 3 _ 5 _ 8 _ 2 = 19 hard #1264: 3 _ 5 _ 8 _ 4 = 17 hard #1265: 3 _ 5 _ 8 _ 8 = 16 hard #1266: 3 _ 5 _ 8 _ 2 = 11 medium #1267: 3 _ 5 _ 8 _ 6 = 20 hard #1268: 3 _ 5 _ 9 _ 3 = 12 hard #1269: 3 _ 5 _ 9 _ 9 = 14 hard #1270: 3 _ 5 _ 9 _ 6 = 10 medium #1271: 3 _ 6 _ 2 _ 3 = 7 easy #1272: 3 _ 6 _ 2 _ 4 = 6 easy #1273: 3 _ 6 _ 2 _ 5 = 18 hard #1274: 3 _ 6 _ 2 _ 3 = -1 easy #1275: 3 _ 6 _ 2 _ 2 = 19 hard #1276: 3 _ 6 _ 2 _ 4 = 9 easy #1277: 3 _ 6 _ 2 _ 2 = 11 easy #1278: 3 _ 6 _ 2 _ 2 = 7 easy #1279: 3 _ 6 _ 2 _ 3 = 6 easy #1280: 3 _ 6 _ 2 _ 4 = 13 medium #1281: 3 _ 6 _ 2 _ 5 = 14 medium #1282: 3 _ 6 _ 2 _ 6 = 15 medium #1283: 3 _ 6 _ 2 _ 6 = 3 easy #1284: 3 _ 6 _ 2 _ 7 = 16 hard #1285: 3 _ 6 _ 2 _ 8 = 17 hard #1286: 3 _ 6 _ 2 _ 8 = 1 easy #1287: 3 _ 6 _ 2 _ 9 = 18 hard #1288: 3 _ 6 _ 2 _ 9 = 1 easy #1289: 3 _ 6 _ 2 _ 1 = 2 easy #1290: 3 _ 6 _ 2 _ 2 = 3 easy #1291: 3 _ 6 _ 2 _ 2 = -1 easy #1292: 3 _ 6 _ 2 _ 4 = -3 easy #1293: 3 _ 6 _ 2 _ 6 = 7 easy #1294: 3 _ 6 _ 2 _ 6 = -5 easy #1295: 3 _ 6 _ 2 _ 7 = -6 medium #1296: 3 _ 6 _ 2 _ 8 = 9 medium