Расставь скобки так, чтобы равенства стали верными:
75+20:5-1=18 80:5+3*5=50
75+20:5-1=78 80:5+3*5=4
75+20:5-1=80 80:5+3*5=95
75+20:5-1=18 80:5+3*5=50
75+20:5-1=78 80:5+3*5=4
75+20:5-1=80 80:5+3*5=95
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75+(20:5)-1=78 80:(5+3*5)=4
75+20:(5-1)=80 (80:5+3)*5=95