Question

Ma ajuta cineva?AJUTATI-MA!!VA ROGG!!Calculati:1.a)1,2(3)+3,2(3)-4,4(6)
b)5,2(1)+6,2(1)-11,4(2)
2.Media aritmetica a nr 4,8;5,14 si x este egala cu 8,1.Determinati-l pe x.
3.a)Exprimati in m:13 km;0,4 hm;25 cm;13987mm
b)Transformati in km:7236 m;12,98 dam;323 dm
4.Utilizati o singura unitate de masura,pentru a exprima:
a)3,15 m+23cm+8mm
b)12,321km+17,679hm+309m
c)0,01m+0,09dm+0,001km.repede!!cat mai repede!!dau coroana!!e neaparat!!URGENTT!!PLS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Answer 1

1. a)4,4(6)-4,4(6)=0
   b)11,4(2)-11,4(2)=0

2.Ma=(4,8+5,14+x):3=8,1
    Ma=9,94+x=24,3
     x=24,3-9,94
     x=14,36

3.a) 13km=13*1000=13000m
       0,4hm=0,4*100=40m
        25cm=25:10=0,25m
       13987mm=13,987m

b) 7236m=7,236km
    12,98dam=0,12398km
     323dm=0,0323km

4.Transformam in mm
a)3,15m+23cm+8mm=3150mm+230mm+8mm=3388mm
     Transformam in m
b)12,321km+17,679hm+309m=12321m+1767,9m+309m=14397,9m
     Transformam in dm
 c)0,01m+0,09dm+0,001km=0,1dm+0,09dm+10dm=10,19dm