Arithmetic Operator Puzzles

#3169: 6 _ 9 _ 4 _ 6 = 1 easy #3170: 6 _ 9 _ 5 _ 3 = -9 hard #3171: 6 _ 9 _ 5 _ 3 = 10 medium #3172: 6 _ 9 _ 5 _ 6 = 20 hard #3173: 6 _ 9 _ 6 _ 4 = 12 hard #3174: 6 _ 9 _ 6 _ 8 = 18 hard #3175: 6 _ 9 _ 6 _ 8 = -6 medium #3176: 6 _ 9 _ 6 _ 3 = 3 easy #3177: 6 _ 9 _ 6 _ 1 = 5 easy #3178: 6 _ 9 _ 6 _ 2 = 6 medium #3179: 6 _ 9 _ 6 _ 2 = 8 easy #3180: 6 _ 9 _ 6 _ 3 = 7 medium #3181: 6 _ 9 _ 6 _ 3 = 1 easy #3182: 6 _ 9 _ 6 _ 4 = 8 medium #3183: 6 _ 9 _ 6 _ 4 = 16 hard #3184: 6 _ 9 _ 6 _ 4 = 1 easy #3185: 6 _ 9 _ 6 _ 5 = 9 medium #3186: 6 _ 9 _ 6 _ 5 = -1 easy #3187: 6 _ 9 _ 6 _ 5 = 20 hard #3188: 6 _ 9 _ 6 _ 6 = 10 medium #3189: 6 _ 9 _ 6 _ 7 = 11 hard #3190: 6 _ 9 _ 6 _ 7 = -3 medium #3191: 6 _ 9 _ 6 _ 8 = 12 hard #3192: 6 _ 9 _ 6 _ 8 = -4 medium #3193: 6 _ 9 _ 6 _ 9 = 13 hard #3194: 6 _ 9 _ 6 _ 9 = -5 medium #3195: 6 _ 9 _ 8 _ 6 = 18 hard #3196: 6 _ 9 _ 8 _ 6 = -6 medium #3197: 6 _ 9 _ 8 _ 3 = 16 hard #3198: 7 _ 1 _ 2 _ 8 = 11 medium #3199: 7 _ 1 _ 2 _ 8 = 3 easy #3200: 7 _ 1 _ 3 _ 9 = 10 medium #3201: 7 _ 1 _ 3 _ 9 = 4 easy #3202: 7 _ 1 _ 4 _ 8 = 9 medium #3203: 7 _ 1 _ 4 _ 8 = 5 easy #3204: 7 _ 2 _ 3 _ 9 = 13 hard #3205: 7 _ 2 _ 3 _ 9 = 1 easy #3206: 7 _ 2 _ 3 _ 3 = 13 medium #3207: 7 _ 2 _ 4 _ 8 = 8 medium #3208: 7 _ 2 _ 4 _ 6 = 10 medium #3209: 7 _ 2 _ 4 _ 8 = 11 medium #3210: 7 _ 2 _ 4 _ 4 = 15 hard #3211: 7 _ 2 _ 4 _ 3 = 11 medium #3212: 7 _ 2 _ 4 _ 4 = 18 hard #3213: 7 _ 2 _ 4 _ 5 = 19 hard #3214: 7 _ 2 _ 4 _ 5 = 9 easy #3215: 7 _ 2 _ 4 _ 6 = 20 hard #3216: 7 _ 2 _ 4 _ 6 = 8 easy