Ответ:
0,4+2/3= 1 2/30
вревращаем 0,4 в 4/10
4/10+2/3= общ. знам. 30 , 30:3=10.30:10=3
4*3=12.2*10=20 = 12/30+20/30= 32/30 =1 2/30
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Ответ:
0,4+2/3= 1 2/30
вревращаем 0,4 в 4/10
4/10+2/3= общ. знам. 30 , 30:3=10.30:10=3
4*3=12.2*10=20 = 12/30+20/30= 32/30 =1 2/30