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olya769
@olya769
July 2022
1
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помогите решить пример 1\5-(-1\9)+(-5 1\3)+5\9-0,2
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antoniolio
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1/5-(-1/9)+(-5 1/3)+5/9-0,2= - 4 целых 2/3
1)
1/5-(-1/9)=1/5+1/9=1*9/45+1*5/45=14/45
2)
14/45+(-5 1/3)=14/45-16/3=14/45-15*16/45=14/45-240/45=-226/45=-5 1/45
3) -5 1/45+5/9=226/45+5*5/45=-226/45+25/45= -201/45=- 4 21/45=-4 7/15
4) - 4 7/15-0,2=-67/15-2/10=-67*2/30-2*3/30=-134/30-6/30=-140/30=-14/3= - 4 2/3
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Answers & Comments
Verified answer
1/5-(-1/9)+(-5 1/3)+5/9-0,2= - 4 целых 2/31)1/5-(-1/9)=1/5+1/9=1*9/45+1*5/45=14/45
2) 14/45+(-5 1/3)=14/45-16/3=14/45-15*16/45=14/45-240/45=-226/45=-5 1/45
3) -5 1/45+5/9=226/45+5*5/45=-226/45+25/45= -201/45=- 4 21/45=-4 7/15
4) - 4 7/15-0,2=-67/15-2/10=-67*2/30-2*3/30=-134/30-6/30=-140/30=-14/3= - 4 2/3