4 + 5 + 9 = 13, 2+ 9 + 5 = 16, (2 +7 ) x 5 = 50, (9 - 3 ) x 5 = 38, (3+ 7) x 5 = 50, 5 + 7 + 8 = 20, 11 + 2 - 9 = 7, (6 -3 ) x 2 = 6, 7 + 6 - 3 = 10, 7 x 6 + 3 = 45, 3 x 6 x 1 = 18, (3 -1 ) x 6 = 15, 5 x 2 + 12 = 22, (13 - 5 ) x 2 = 12, 4 -2 + 5 = 7, 4 -2 + 5 = 7, (2 + 5) x 4 = 28, (3 + 4) x 5 = 30, (6 +3 ) x7 = 60, 7 + 6 - 3 = 10, (6 +3 ) x7 = 63, (7 + 1 ) x 5 = 44, 8 + 4 - 1 = 11, 8 + 4 - 1 = 11, (5 + 3 ) x 10 = 80

Hit the point. (數學 答題-練習)

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