Пусть неизвестное будет х тогда
х+56=99
х=99-56
х=33
20/27 * 3/5 + 1/10 : 3/100 = 3 7/9
20/27 * 3/5 + 1/10 : 3/100 = 4/9 + 1/10 : 3/100 = 4/9 + 1/10 * 100/3 = 4/9 + 10/3
НОК(9,3) = 9
(4*1 + 10*3)/9 = (4 + 30)/9 = 34/9 = 3 7/9
3/4 ÷ 9/16 - 5/8 * 4/15 = 1 1/6
3/4 ÷ 9/16 - 5/8 * 4/15 = 3/4 * 16/9 - 5/8 * 4/15 = 4/3 - 5/8 * 4/15 = 4/3 - 1/6
НОК(3,6) = 6
(4*2 - 1*1)/6 = (8 - 1)/6 = 7/6 = 1 1/6
3/9=1/3 15/25=3/5 5/15 и 9/15
4/6=2/3 6/8=3/4 8/12 и 9/12
2/4=1/2 6/9=2/3 3/6 и 4/6
21/98=3/14 20/84=5/21 9/42 и 10/42
12/108=1/9 70/180=7/18 2/18 и 7/18
14/35=2/5 20/45=4/9 18/45 и 20/45
8/64=1/8 175/280=35/56=5/8 1/8 и 5/8
108,8 : 0,00064=170000 = 1,7* 10 ^ 5
5×8=40 (на 2 деляне собрали)
5+40=45 ящиков моркови собрали с двух делянок.