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129kl-20dal=?hl,16l+210dl-2800cl=?l, 5000mm+800cm+8m=?m

Răspuns :

1290 hl - 2 hl = 1288 hl
16 l + 21 l - 28.00000 l = 9 l
5.000000 m + 8. 000000 l + 8 l = 21 l