Question

va rog ajutor urgent! ex cls a 4 a : efectuează transformările , apoi efectuează operațiile: a) 305m-17000mm+4dm=?m ; b) 600mm-25cm+3m=?cm ; c) 960cm-6m+58dm-1200mm=?dm ; d) 800m-2700cm-3500dm=?m

Answer 1

a)

305 m - 17 000 mm + 4 dm = ?m

= 305 m - 17 m + 0,4 m =

= 288 m - 0,4 m=

= 287,6 m

dm < m de 10 ori

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b)

600 mm - 25 cm + 3 m = ? cm

= 60 cm - 25 cm + 300 cm =

= 35 cm + 300 cm =

= 335 cm

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c)

960 cm - 6 m + 58 dm - 1 200 mm = ? dm

= 96 dm - 60 dm + 58 dm - 12 dm =

= 36 dm + 58 dm - 12 dm =

= 94 dm - 12 dm =

= 82 dm

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d)

800 m - 2 700 cm - 3 500 dm = ? m

= 800 m - 27 m - 350 m =

= 773 m - 350 m =

= 423 m