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koltyrinajulia
@koltyrinajulia
July 2022
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решите пожалуйста примеры:1)-0,4*0,6*(-4 целых 1/6) 2)-12*(-8,6)-9,4 3)1/2-9/25(дроби) 4)0,8/1-1/9 5)1/1/30+1/42 6)1целая 1/12:(1 целая 13/18-2 целых 5/9)
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ndusha
Verified answer
1)-0,4*0,6*(-4 1/6)=0,4*0,6*25/6=0,4*0,1*25= 0,4*2,5=1
2)-12*(-8,6)-9,4 =12*8,6-9,4=103,2-9,4=93,8
3)1/2-9/25=25/50-18/50=7/50
4)0,8/1-1/9 =0,8-1/9=8/10-1/9=4/5-1/9=36/45-5/45=31/45
5)1/1/30+1/42 =1/30+1/42=7/210+5/210=12/210=6/105
6)1 1/12:(1 13/18-2 5/9)=
13/12:(1 13/18-2 10/18)=13/12:(-15/18)=-13/12:5/6=
=-13/12*6/5=-13/2*1/5=-13/10=-1 3/10
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Answers & Comments
Verified answer
1)-0,4*0,6*(-4 1/6)=0,4*0,6*25/6=0,4*0,1*25= 0,4*2,5=12)-12*(-8,6)-9,4 =12*8,6-9,4=103,2-9,4=93,8
3)1/2-9/25=25/50-18/50=7/50
4)0,8/1-1/9 =0,8-1/9=8/10-1/9=4/5-1/9=36/45-5/45=31/45
5)1/1/30+1/42 =1/30+1/42=7/210+5/210=12/210=6/105
6)1 1/12:(1 13/18-2 5/9)=13/12:(1 13/18-2 10/18)=13/12:(-15/18)=-13/12:5/6=
=-13/12*6/5=-13/2*1/5=-13/10=-1 3/10