111*79+333*7等于多少?要用简便方法!
问题描述:
111*79+333*7等于多少?要用简便方法!
答
=111x79+111x3x7 =111x(79+21) =111x100 =11100
111*79+333*7等于多少?要用简便方法!
=111x79+111x3x7 =111x(79+21) =111x100 =11100