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Zarishka1312
@Zarishka1312
July 2022
1
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Найдите число противоположное и число обратное значению выражения:
а)(-5/6+1 3/5)*(-4/5-1,2)
б)(5 2/3-8 3/4)*(- 8 3/4+5 2/3)
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tatsach
а)(-5/6+1 3/5)*(-4/5-1,2)=-69/50=-1 19/50
-5/6+1 3/5=-5/6+8/5=-25/30+48/30=23/30
-4/5-1/2=-8/10-5/10=-18/10
23/30*(-18/10)=-69/50
противоположное 69/50, обратное 50/69
б)(5 2/3-8 3/4)*(- 8 3/4+5 2/3)=
1369/144=9 73/144
5 2/3-8 3/4=17/3-35/4=68/12-105/12=-37/12
- 8 3/4+5 2/3=-35/4+17/3=-105/12+68/12=-37/12
-37/12*(-37/12)=1369/144
противоположное -1369/144, обратное 144/1369
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Answers & Comments
-5/6+1 3/5=-5/6+8/5=-25/30+48/30=23/30
-4/5-1/2=-8/10-5/10=-18/10
23/30*(-18/10)=-69/50
противоположное 69/50, обратное 50/69
б)(5 2/3-8 3/4)*(- 8 3/4+5 2/3)=1369/144=9 73/144
5 2/3-8 3/4=17/3-35/4=68/12-105/12=-37/12
- 8 3/4+5 2/3=-35/4+17/3=-105/12+68/12=-37/12
-37/12*(-37/12)=1369/144
противоположное -1369/144, обратное 144/1369