(99-9)*9=810
Вот так)))))))))
1дм²=0,01м²
1см²=0,0001м²
4,09м²-0,045м²*2=4,09-0,09=4м²
((32/57 + 27/38) * 19/29 + (25/26 + 48/65) * 10/51 + (74/75 + 49/50) * 15/59) * 3/5 =
= ((145/114) * 19/29 + (25/26 + 48/65) * 10/51 + (74/75 + 49/50) * 15/59) * 3/5 =
= ((145/114) * 19/29 + (17/10) * 10/51 + (74/75 + 49/50) * 15/59) * 3/5 =
= ((145/114) * 19/29 + (17/10) * 10/51 + (59/30) * 15/59) * 3/5 =
= (5/6 + (17/10) * 10/51 + (59/30) * 15/59) * 3/5 =
= (5/6 + 1/3 + (59/30) * 15/59) * 3/5 = (5/6 + 1/3 + 1/2) * 3/5 =
= (5/3) * 3/5 = 1