(13/30-11/20)*9/5= -0,21
1) 13/30-11/20=26/60-33/60=-7/60
2) -7/60*9/5=-0.21
Ответ: -0,21
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(13/30-11/20)*9/5= -0,21
1) 13/30-11/20=26/60-33/60=-7/60
2) -7/60*9/5=-0.21
Ответ: -0,21