150:5+(906):9+3= 140:20-(180:20-5)=
50x5+270:9+2x40=
80x5-(70x9-3x80)=
90x6-60x8+240:6=
90x4+2x50-20X6=
80x7+3x30-5x50=
60X5+630:7+2x80=
450:5+ 180:60-24=
350:50-210:70-4=
помогите​
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