Воть....#3 и #4 плзззз

Question

Воть....#3 и #4
плзззз

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Answer 1

3) (1/2)*5*2=5
(1/2)*2*2=2
5-2=3

4)(1/2)*4*1=2
(1/2)*1*1=1/2
2-1/2=3/2
1/2*(3+1)*1=2
(1/2)2*2=2
(1/2)*1*2=1
2-1=1
(3/2)+2+1=4,5

ответ: 3; 4,5