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1.Calcualati si transformati:
284 m + 79 m= ? m
792 m -320 m= ? m
468 cm + 32 cm = ? m
268 hl - ? hl=20 kl
924 dm - ? dm = 2 m
45 min+? min= 3 h


Răspuns :

♥284 m + 79 m= 363 m

♥792 m -320 m= 472 m

♥468 cm + 32 cm = 500 cm = 5 m 

♥268 hl - ? hl=20 kl
20 kl = 200 hl
268 hl - ? hl = 200 hl
268 hl - 68 hl = 200 hl

♥924 dm - ? dm = 2 m
2 m = 20 dm
924 dm - ? dm = 20 dm
924 dm - 904 dm = 20 dm

♥45 min+? min= 3 h 
3 h = 3 * 60 = 180 min
45 min + ? min=180 min
45 min + 135 min = 180 min