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матиматик13
@матиматик13
July 2022
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Помогитеипожалуйста номер 13
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LyubaAlexandorovna
А) 0,(3)=3/9=1/3
0,2(5)=(25-2)/90=23/90
1,5(3)=1 (53-5)/90=1 48/90
((1/3)+(1/6))*4/((23/90):(138/90))=2/(1/6)=12
б) 0,(7)=7/9
0,(09)=09/99=1/11
(7/9)+(9/99)=(77+9)/99=86/99
7,4-8,4=-1
(86/99)/(-1)=-86/99
7,3:21,9=1/3
(-86/99)+(1/3)=(33/99)-(86/99)=-53/99
в) 0,4(1)=(41-4)/90=37/90
0,3(5)=(35-3)/90=32/90
0,(5)=5/9
(37/90)+(1/9)=47/90
(47/90)*(9/47)=47*9/90*47=1/10
(32/90):5/9=32*9/(90*5)=32/50
(32/50):32=1/50
(1/10):(1/50)=50/10=5
г) 0,(6)=6/9
1,12(3)=1 (123-12)/900=1 111/900=1011/900
(6/9)+(1/3)=9/9=1
1:0,25=4
(1011/900):(925/10000)=1011*10000/(900*925)=101100/8325=4044/333=
=1348/111=12 16/111
12,5*0,64=8
8+12 16/111=20 16/111
1 votes
Thanks 1
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Answers & Comments
0,2(5)=(25-2)/90=23/90
1,5(3)=1 (53-5)/90=1 48/90
((1/3)+(1/6))*4/((23/90):(138/90))=2/(1/6)=12
б) 0,(7)=7/9
0,(09)=09/99=1/11
(7/9)+(9/99)=(77+9)/99=86/99
7,4-8,4=-1
(86/99)/(-1)=-86/99
7,3:21,9=1/3
(-86/99)+(1/3)=(33/99)-(86/99)=-53/99
в) 0,4(1)=(41-4)/90=37/90
0,3(5)=(35-3)/90=32/90
0,(5)=5/9
(37/90)+(1/9)=47/90
(47/90)*(9/47)=47*9/90*47=1/10
(32/90):5/9=32*9/(90*5)=32/50
(32/50):32=1/50
(1/10):(1/50)=50/10=5
г) 0,(6)=6/9
1,12(3)=1 (123-12)/900=1 111/900=1011/900
(6/9)+(1/3)=9/9=1
1:0,25=4
(1011/900):(925/10000)=1011*10000/(900*925)=101100/8325=4044/333=
=1348/111=12 16/111
12,5*0,64=8
8+12 16/111=20 16/111