Question

помогите срочно дам 25 баллов сделайте 154 156

Answer 1

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Answer 2

№154
(7-5*(1 2/3)):0.8+0.2 = 
(7-5*5/3)/(8/10)+1/5 =
(7-25/3)*5/4+1/5 = 
((21-25)/3)*5/4+1/5 = 
(-4/3)*5/4+1/5 = 
-5/3+1/5 = 
-25/15+3/15 = 
-22/15 = -1 7/15
№156
(2 1/4)*(4/15+0.9)-(1/6)*2.25 = 
(9/4)*(4/15+9/10)-(1/6)*(9/4) = 
(9/4)*(4/15+9/10-1/6) = 
(9/4)*(8/30+27/30-5/30) = 
(9/4)*(30/30) = 
9/4 = 2.25