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Find the property that each equation shows.
Write the equation in the correct box.
15x (7 X 9) = (15 × 7) × 9
13+ (3 + 7) = (13 + 3) + 7
1X9=9
23+ 4+ 109 = 4+23+ 109
87 X 3 = 3 X 87
0 + 16 = 16