(1/5×3/4)×2/3; 2/9×(3/10×7/8); 15/19×(19/25×7/9)×5/7; (10/13×11/12)×(12/55×13/20)

Question

(1/5×3/4)×2/3; 2/9×(3/10×7/8); 15/19×(19/25×7/9)×5/7; (10/13×11/12)×(12/55×13/20)

Answer 1

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