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a fost răspuns

Afla nr.necunoscut : a) 4/7+a=6/7 ,b)6Xb=948,c)764 : c =7r1 si 31t+21kg +500 dg +20 q = kg

Răspuns :

a).4/7+a=6/7=>a=6/7-4/7=2/7; b).6×b=948=>b=948÷6=158; c).764÷c=7r1<=>764=7×c+1<=>7c=763=> c=109. d).31t+21kg+500dg+20q=31000kg+21kg+0,05kg+2000=33021,05kg.

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