Arithmetic Operator Puzzles

#4273: 9 _ 3 _ 8 _ 4 = 20 hard #4274: 9 _ 3 _ 8 _ 4 = 6 easy #4275: 9 _ 3 _ 8 _ 6 = 18 hard #4276: 9 _ 3 _ 8 _ 7 = 17 hard #4277: 9 _ 3 _ 8 _ 8 = 16 hard #4278: 9 _ 3 _ 8 _ 9 = 15 hard #4279: 9 _ 3 _ 9 _ 3 = 10 medium #4280: 9 _ 3 _ 9 _ 6 = 11 hard #4281: 9 _ 3 _ 9 _ 3 = 8 medium #4282: 9 _ 3 _ 9 _ 6 = 7 medium #4283: 9 _ 3 _ 9 _ 2 = 6 easy #4284: 9 _ 3 _ 9 _ 4 = 12 medium #4285: 9 _ 3 _ 9 _ 5 = 15 hard #4286: 9 _ 3 _ 9 _ 7 = 20 hard #4287: 9 _ 3 _ 9 _ 8 = 19 hard #4288: 9 _ 3 _ 9 _ 9 = 18 hard #4289: 9 _ 3 _ 9 _ 6 = 2 easy #4290: 9 _ 4 _ 2 _ 4 = 17 hard #4291: 9 _ 4 _ 2 _ 5 = 19 hard #4292: 9 _ 4 _ 2 _ 8 = 8 medium #4293: 9 _ 4 _ 2 _ 3 = 3 easy #4294: 9 _ 4 _ 2 _ 4 = 1 easy #4295: 9 _ 4 _ 2 _ 5 = -1 easy #4296: 9 _ 4 _ 2 _ 7 = -5 medium #4297: 9 _ 4 _ 2 _ 9 = -9 hard #4298: 9 _ 4 _ 2 _ 1 = 19 hard #4299: 9 _ 4 _ 2 _ 2 = 20 hard #4300: 9 _ 4 _ 2 _ 2 = 16 hard #4301: 9 _ 4 _ 2 _ 4 = 14 hard #4302: 9 _ 4 _ 2 _ 5 = 13 hard #4303: 9 _ 4 _ 2 _ 6 = 3 easy #4304: 9 _ 4 _ 2 _ 7 = 11 hard #4305: 9 _ 4 _ 2 _ 9 = 9 medium #4306: 9 _ 4 _ 3 _ 2 = 15 hard #4307: 9 _ 4 _ 3 _ 6 = 11 hard #4308: 9 _ 4 _ 3 _ 6 = 17 hard #4309: 9 _ 4 _ 3 _ 2 = 3 easy #4310: 9 _ 4 _ 3 _ 6 = 7 medium #4311: 9 _ 4 _ 3 _ 6 = 1 easy #4312: 9 _ 4 _ 3 _ 9 = -3 medium #4313: 9 _ 4 _ 3 _ 1 = 13 hard #4314: 9 _ 4 _ 3 _ 3 = 15 hard #4315: 9 _ 4 _ 3 _ 3 = 9 medium #4316: 9 _ 4 _ 3 _ 4 = 16 hard #4317: 9 _ 4 _ 3 _ 4 = 8 medium #4318: 9 _ 4 _ 3 _ 5 = 17 hard #4319: 9 _ 4 _ 3 _ 6 = 6 medium #4320: 9 _ 4 _ 3 _ 7 = 19 hard