巧算:2.2*0.4*1.25*2.6 1.625+2.625+3.625+…+80.625 5.5*6.6+6.6*7
巧算:2.2*0.4*1.25*2.6 1.625+2.625+3.625+…+80.625 5.5*6.6+6.6*7
1.625+2.625+3.625+...+79.625+80.625 用乘法分配律 怎么写
简便方法计算 1.625+2.625+3.625+······+79.625+80.625
1.625+2.625+3.625+...+79.625+80.625等于多少?要的是计算方法大神们帮帮忙
1.625+2.625+3.625+...79.625+80.625把每一个小数拆成整数部分和小数部分的和,然后把整数部
巧算24点:6.6.6.7
简算 1.25*1.4+6.6*0.25
9.9+(1.1-2.2)+(3.3-4.4)+(5.5-6.6)+(7.7-8.8)简便计算
1.1+2.2+3.3+4.4+5.5+6.6+7.7+8.8+9.9=?用简略计算
1.625+2.625+3.625+···+79.625+80.62用乘法分配率怎么算?
5.5×6.6+6.6×7.7+7.7×8.8+8.8×9.9.
1.2,1.4,2.6,4,6.6,( ),( )找规律.