39乘99加39的简便方法

詹吴尚387239加99乘三九用简便方法算 -
席征俊17870253794 ______[答案] 39加99乘三九 =39x(1+99) =39x100 =3900

詹吴尚387239x99十39用乘法分配律,算得又对又快 -
席征俊17870253794 ______ 反用乘法分配律 a(b+c)=ab+ac39x99十39=39x(99十1)=39x100=3900

詹吴尚387299*39+39= (递等式简便计算) -
席征俊17870253794 ______ 99*39+39= (99+1)*39=100*39=3900

詹吴尚387299乘39加39怎样简算
席征俊17870253794 ______ 99x39+39x1----39x(99+10)

詹吴尚387239乘以99减去39利用简便运算怎么做? -
席征俊17870253794 ______[答案] 39*99-39 =39*(99- 1) =39*98 =39*(100-2) =39*100-39*2 =3900-78 =3822

詹吴尚387299乘 39加39简便运算 -
席征俊17870253794 ______ 100乘以39减39加39得3900

詹吴尚387239*99简便算式 -
席征俊17870253794 ______ 39*99=39x(100-1)=39x100-39x1=3900-39=3861

詹吴尚387239+39乘九简便计算 -
席征俊17870253794 ______ 39+39乘九简便计算算式怎么39+39乘九=39*(1+9)=39*10=390

詹吴尚3872简便计算39乘以99加99 怎么做? 急啊
席征俊17870253794 ______ 39x99+99=99(39+1)=99x40=3960

詹吴尚387239乘99又39分之38 -
席征俊17870253794 ______ 等于39x(99x39+38)÷39=99x39+38=3899