Ответы и объяснения

  • pAds
  • отличник
2014-03-13T18:45:09+04:00
10 3/7* 2/7 + 2/7 *8 5/21 = 146/49 + 346/147 = 438/147 + 346/147 = 784/147 =112/21
1)
10 3/7* 2/7 = 73/7 * 2/7 = 146/49
2)2/7 *8 5/21 = 2/7 * 173/21 = 346/147
2014-03-13T18:51:26+04:00
10 3/7* 2/7 +2/7 *8 5/21=73/7*2/7+2/7*181/21=146/49+346/147=2 48/49+2 52/147=
438/147 + 346/147 = 784/147 =112/21= 5 7/21