#589 (4-6)!!!!!!!!!!!!!!

Question

#589 (4-6)!!!!!!!!!!!!!!

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Answer 1

4) =8/5*15/2=4/1*3/1=12
5) =15/7*32/5=32/7=4. 4/7
6) =20/9*99/40=11/2=5. 1/2