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200cm:10×4-8cm×5=?mm

Răspuns :

200cm:10×4-8cm×5=
20x4-40=
80-40=
=40cm 
=400mm
200cm:10x4-8cmx5=
20cmx4-40cm=
80cm-40cm=
40cm=
400mm
Sper ca te-am ajutat!^^