118. 24√6 × √3 × √2/2 = 72
119. 30√2 × (-√2/2) × 1/2 = -15
120. 28÷( (-√2/2) × √2/2) = -56
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118. 24√6 × √3 × √2/2 = 72
119. 30√2 × (-√2/2) × 1/2 = -15
120. 28÷( (-√2/2) × √2/2) = -56