69乘102减138简便算法
69×102减138用简便运算 -
=69x(102-2)=69x100 =6900
=69x（102-2）69x100 =6900
=69x(102-2)=69x100 =6900
=69x（102-2）69x100 =6900
69 x 102-138 =69 x 102-69x2 =69x(102-2)=69x100 =6900 如图，
=69x(102-2)=69x100 =6900
138×2÷69×50怎么简便怎么算 -
如图，
这道题这样算，算式138-（69+31）38，就是这个意思，
138-(138-69)简便顺序分配率怎么算? -
=138-138+69【减号后面括号里的减号要变成加号】69
138x27/69×50 =69×27/69×（50×2）27×100 =2700
138-69+62-31怎么简便计算? -
运用加法交换律和结合律即可，138+62-69-31 =(138+62)-(69+31)=200-100 =100
98×69+138的简便运算=（100-2）x69+138 =6900-138+138 =6900