Question

0,25 m ori 1, (1) dm = ?

Answer 1

0,25m=25/100m
1,[1]dm=11-1/9dm=10/9dm
⇒25/100m ·10/9dm=25/10m· 1/9dm=25/1dm ·1/9dm=25/9dm=2,[7]dm,

Answer 2

1) 0, 25 m = 25/ 100 dm = 1/ 4 dm, se fac transformarile din metrii (m) in decimetrii( dm)
2) 1,( 1)dm = ( 11 - 1) /9 dm = 10/ 9 dm
3) 0, 25 m · 1, ( 1) dm = 1/ 4 dm · 10/ 9 dm
                                 = 10/ 36 dm
                                 = 5/ 18 dm
                                 = 0, 2( 7) dm