Question

Номер 1.16 очень срочно прошу!!!!

Answer 1

$a*25=\frac{a*25*4}{4} =\frac{100*a}{4}\\\\ 484*25=\frac{484*25*4}{4}=\frac{48400}{4}=12100\\\\683*25=\frac{683*25*4}{4}=\frac{68300}{4}=17075\\\\48*25=\frac{48*25*4}{4}=\frac{4800}{4}=1200\\\\64*25=\frac{64*25*4}{4}=\frac{6400}{4}=1600\\\\6416*25=\frac{6416*25*4}{4}=\frac{641600}{4}=160400\\\\347*25=\frac{347*25*4}{4}=\frac{34700}{4}=8675$