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c) 16:4 x 3 x 12:6:4x5= d) 25 x 25: 5:5x6:3x 10 = (e) 12 x 15: 18 x 100: 4: 50 x 3 = (f) 1 000-409 x 6:3+567x6= 6 x 34-120: 5 + 11 x 22 = h) 180:9-16 +21+144:8 +225:3=​