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25% = 1/4
1/4 x 120
= 120:4
=30
=2400 cm
=24 km
15.0,8 hm=...cm
=0,8×10.000
=8.000 cm
17. =18 3/4 - 7 1/2
=75/4 - 15/2=75/4 - 30/4=45/4
=11 1/4