Предмет: Русский язык, автор: оля1694

помргите пожалуйста сделать 34 номер

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Автор ответа: PinkMarshmallows

1) 3200+х=4500
х=1300

х•30=270
х=90
2) х•60=1800
х=1800:60
х=30
———
30•60=1800
3) 20•20=400
50•50=2500

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