Ответ:
15*239-237*15=15*(239-237)=15*2=30
763*27+237*27=27(763+237)=27*1000=27000
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Ответ:
15*239-237*15=15*(239-237)=15*2=30
763*27+237*27=27(763+237)=27*1000=27000