Shu xue qi shi hen jian dan = Hua xue qi shi hen jian dan = Wu li qi shi hen jian dan = Di qiu ke xue qi shi hen jian dan = Xiao shou qi shi hen jian dan : Yang tai, qi shi hen jian dan / Yang tai, qi shi hen jian dan/ Wo de gang qin hen jian dan : Zhong guo dian shi shou shi nian jian = Shu xue qi shi hen jian dan =: Mathematics made simple /