Arithmetic Operator Puzzles

#1: 1 _ 1 _ 2 _ 8 = 5 easy #2: 1 _ 1 _ 2 _ 8 = -3 easy #3: 1 _ 1 _ 3 _ 9 = 4 easy #4: 1 _ 1 _ 3 _ 9 = -2 medium #5: 1 _ 1 _ 4 _ 8 = 3 easy #6: 1 _ 1 _ 4 _ 8 = -1 easy #7: 1 _ 2 _ 2 _ 4 = 2 easy #8: 1 _ 2 _ 2 _ 2 = 1 easy #9: 1 _ 2 _ 2 _ 8 = 2 easy #10: 1 _ 2 _ 3 _ 9 = 7 medium #11: 1 _ 2 _ 3 _ 6 = -3 easy #12: 1 _ 2 _ 3 _ 9 = -5 medium #13: 1 _ 2 _ 3 _ 3 = 1 easy #14: 1 _ 2 _ 3 _ 6 = 4 easy #15: 1 _ 2 _ 3 _ 9 = 6 easy #16: 1 _ 2 _ 3 _ 6 = 9 easy #17: 1 _ 2 _ 3 _ 8 = 12 medium #18: 1 _ 2 _ 4 _ 8 = 2 easy #19: 1 _ 2 _ 4 _ 2 = 2 easy #20: 1 _ 2 _ 4 _ 8 = 5 easy #21: 1 _ 2 _ 4 _ 6 = -2 easy #22: 1 _ 2 _ 4 _ 8 = -3 easy #23: 1 _ 2 _ 4 _ 4 = 1 easy #24: 1 _ 2 _ 4 _ 8 = 4 easy #25: 1 _ 2 _ 4 _ 1 = 1 easy #26: 1 _ 2 _ 4 _ 3 = -1 easy #27: 1 _ 2 _ 4 _ 4 = 6 easy #28: 1 _ 2 _ 4 _ 4 = 8 easy #29: 1 _ 2 _ 4 _ 5 = 7 easy #30: 1 _ 2 _ 4 _ 5 = -3 easy #31: 1 _ 2 _ 4 _ 5 = 10 easy #32: 1 _ 2 _ 4 _ 6 = 8 easy #33: 1 _ 2 _ 4 _ 6 = -4 easy #34: 1 _ 2 _ 4 _ 7 = 9 easy #35: 1 _ 2 _ 4 _ 7 = -5 easy #36: 1 _ 2 _ 4 _ 8 = 10 medium #37: 1 _ 2 _ 4 _ 8 = -6 medium #38: 1 _ 2 _ 4 _ 9 = 11 hard #39: 1 _ 2 _ 4 _ 9 = -7 hard #40: 1 _ 2 _ 5 _ 5 = 1 easy #41: 1 _ 2 _ 5 _ 4 = 10 easy #42: 1 _ 2 _ 5 _ 6 = 15 medium #43: 1 _ 2 _ 5 _ 8 = 20 hard #44: 1 _ 2 _ 6 _ 4 = -2 easy #45: 1 _ 2 _ 6 _ 6 = 1 easy #46: 1 _ 2 _ 6 _ 4 = 3 easy #47: 1 _ 2 _ 6 _ 1 = 2 easy #48: 1 _ 2 _ 6 _ 2 = 1 easy