Arithmetic Operator Puzzles

#3841: 8 _ 4 _ 8 _ 7 = 9 medium #3842: 8 _ 4 _ 8 _ 8 = 8 medium #3843: 8 _ 4 _ 8 _ 9 = 7 medium #3844: 8 _ 4 _ 9 _ 6 = 14 hard #3845: 8 _ 4 _ 9 _ 6 = 2 easy #3846: 8 _ 4 _ 9 _ 1 = 19 hard #3847: 8 _ 4 _ 9 _ 1 = 17 hard #3848: 8 _ 4 _ 9 _ 2 = 16 hard #3849: 8 _ 4 _ 9 _ 4 = 14 hard #3850: 8 _ 4 _ 9 _ 5 = 13 hard #3851: 8 _ 4 _ 9 _ 6 = 12 hard #3852: 8 _ 4 _ 9 _ 6 = 3 easy #3853: 8 _ 4 _ 9 _ 7 = 11 hard #3854: 8 _ 4 _ 9 _ 8 = 10 medium #3855: 8 _ 4 _ 9 _ 9 = 9 medium #3856: 8 _ 5 _ 2 _ 4 = 18 hard #3857: 8 _ 5 _ 2 _ 4 = -2 easy #3858: 8 _ 5 _ 2 _ 6 = -7 medium #3859: 8 _ 5 _ 2 _ 4 = 20 hard #3860: 8 _ 5 _ 2 _ 2 = 18 hard #3861: 8 _ 5 _ 2 _ 2 = 10 easy #3862: 8 _ 5 _ 2 _ 3 = 17 hard #3863: 8 _ 5 _ 2 _ 4 = 16 hard #3864: 8 _ 5 _ 2 _ 5 = 15 hard #3865: 8 _ 5 _ 2 _ 6 = 14 hard #3866: 8 _ 5 _ 2 _ 7 = 13 hard #3867: 8 _ 5 _ 2 _ 8 = 12 medium #3868: 8 _ 5 _ 2 _ 9 = 11 hard #3869: 8 _ 5 _ 3 _ 6 = 18 hard #3870: 8 _ 5 _ 3 _ 6 = -2 easy #3871: 8 _ 5 _ 3 _ 9 = -7 hard #3872: 8 _ 5 _ 3 _ 6 = 20 hard #3873: 8 _ 5 _ 4 _ 2 = 18 hard #3874: 8 _ 5 _ 4 _ 2 = -2 easy #3875: 8 _ 5 _ 4 _ 8 = -2 easy #3876: 8 _ 5 _ 4 _ 1 = 11 medium #3877: 8 _ 5 _ 4 _ 2 = 12 medium #3878: 8 _ 5 _ 4 _ 2 = 8 medium #3879: 8 _ 5 _ 4 _ 2 = 20 hard #3880: 8 _ 5 _ 4 _ 3 = 13 hard #3881: 8 _ 5 _ 4 _ 3 = 7 easy #3882: 8 _ 5 _ 4 _ 4 = 6 easy #3883: 8 _ 5 _ 4 _ 5 = 15 hard #3884: 8 _ 5 _ 4 _ 5 = 5 easy #3885: 8 _ 5 _ 4 _ 6 = 4 easy #3886: 8 _ 5 _ 4 _ 7 = 17 hard #3887: 8 _ 5 _ 4 _ 7 = 3 easy #3888: 8 _ 5 _ 4 _ 8 = 2 easy