Easy Arithmetic Puzzles

#614: 2 _ 3 _ 9 _ 6 = 1 easy #616: 2 _ 3 _ 9 _ 7 = -1 easy #620: 2 _ 4 _ 2 _ 8 = 3 easy #621: 2 _ 4 _ 2 _ 3 = 8 easy #622: 2 _ 4 _ 2 _ 5 = 12 easy #625: 2 _ 4 _ 2 _ 8 = 1 easy #626: 2 _ 4 _ 2 _ 3 = -4 easy #627: 2 _ 4 _ 2 _ 4 = -6 easy #628: 2 _ 4 _ 2 _ 5 = -8 easy #629: 2 _ 4 _ 2 _ 2 = 9 easy #631: 2 _ 4 _ 2 _ 1 = 2 easy #632: 2 _ 4 _ 2 _ 3 = -2 easy #633: 2 _ 4 _ 2 _ 4 = 5 easy #634: 2 _ 4 _ 2 _ 4 = -3 easy #635: 2 _ 4 _ 2 _ 5 = 6 easy #636: 2 _ 4 _ 2 _ 6 = 7 easy #637: 2 _ 4 _ 2 _ 6 = -5 easy #638: 2 _ 4 _ 2 _ 7 = 8 easy #643: 2 _ 4 _ 3 _ 2 = 8 easy #644: 2 _ 4 _ 3 _ 6 = 10 easy #645: 2 _ 4 _ 3 _ 2 = -4 easy #646: 2 _ 4 _ 3 _ 6 = -6 easy #647: 2 _ 4 _ 3 _ 3 = 9 easy #649: 2 _ 4 _ 4 _ 2 = -6 easy #650: 2 _ 4 _ 4 _ 4 = 9 easy #651: 2 _ 4 _ 5 _ 2 = 12 easy #652: 2 _ 4 _ 5 _ 2 = -8 easy #653: 2 _ 4 _ 5 _ 5 = 9 easy #656: 2 _ 4 _ 6 _ 8 = 5 easy #658: 2 _ 4 _ 6 _ 3 = -6 easy #659: 2 _ 4 _ 6 _ 8 = -1 easy #661: 2 _ 4 _ 6 _ 2 = 11 easy #662: 2 _ 4 _ 6 _ 4 = 7 easy #663: 2 _ 4 _ 6 _ 5 = 8 easy #664: 2 _ 4 _ 6 _ 5 = -2 easy #667: 2 _ 4 _ 6 _ 7 = -4 easy #672: 2 _ 4 _ 7 _ 7 = 9 easy #673: 2 _ 4 _ 8 _ 6 = 5 easy #674: 2 _ 4 _ 8 _ 2 = 1 easy #675: 2 _ 4 _ 8 _ 6 = -1 easy #676: 2 _ 4 _ 8 _ 4 = 6 easy #677: 2 _ 4 _ 8 _ 1 = 2 easy #678: 2 _ 4 _ 8 _ 2 = -1 easy #679: 2 _ 4 _ 8 _ 3 = 4 easy #680: 2 _ 4 _ 8 _ 3 = -2 easy #681: 2 _ 4 _ 8 _ 4 = 5 easy #682: 2 _ 4 _ 8 _ 4 = -3 easy #683: 2 _ 4 _ 8 _ 5 = 6 easy