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calculati: (4supra4:2supra6+3supra 121 :9supra60+25 supra 3:5supra 4 ):4

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 (4/4:2/6+3/121 :9/60+25/3:5/4):4=
=
 (1 :1/3+3/121 :3/20+25/3:5/4):4=
= (1×3+3/121 ×20/3+25/3 ×4/5):4=
= (1×3+20/121 +20/3):4=
= (3+20/121 +20/3):4=
=(1089+60+2420)/363 × 1/4=
=3569/1452