19名战士要过河,只有一条船,每次只能做4名战士,至少要渡几次才能使全部战士过河?(`5~4x5T/?2j4~4u'f,o6d1s5p(C0a/D
算式:提示5R-r:?2^'M(~*l5Z/D3B(`5~4x5T/?2j4~4u'f,o6d1s5p(C0a/D
答:至少要渡3@2U4X1g:i4g-F:e5v4^-Q次才能使全部战士过河。(`5~4x5T/?2j4~4u'f,o6d1s5p(C0a/D