Question

расставь скобки 75+20:5-1=18, 75+20:5-1=78, 75+20:5-1=80, 80:5+3•5=50, 80:5+3•5=4, 80:5+3•5=95.

Answer 1

(75+20):5-1=18,
75+(20:5-1)=78,
75+20:(5-1)=80,

80:(5+3)•5=50,
80:(5+3•5)=4,
(80:5+3)•5=95.