9.7+99.7+999.7+9999.7+99999.7简算

9.7+99.7+999.7+9999.7+99999.7简算 0.7+9.7+99.7+999.7+…+999999999.7=? 简算9.7+99.7+999.7+9999.7+99999.7谢谢了,大神帮忙啊 0.7+9.7+99.7+999.7+9999.7+99999.7+999999.7+9999999.7+99999999.7+999999999.7= 9.8+99.8+999.8+9999. 9+99+999+9999...+99999999 0.8+9.8+99.8+999.8+9999. 1加9999.等于多少? 19.94+99.7×99.8 9.7*0.47+1.53*9.7-9.7(简便计算) 9.7×98-9.7+9.7×3简便运算 999.6+999.7+999.8+1000.8+1000.7+1000.6简便运算 巧算 99.6+99.8+99.7+99.1 19.94+99.7×99.8 help me 99.9+99.8-99.7=?简便计算 49.7+59.7+69.7+.+99.7+109.7简算 99.7%氧化锌中锌的含量是多少? 碳13尿素呼气试验99.7