1-20根号顺口溜？(1到20顺口溜)

11-19的平方原数加尾数，尾平方；逢10进位；41-49的平方尾加15，10减尾再平方，占2位；51-59的平方尾加二十五，尾平方占2位；91-99的平方尾数乘2加80，10减尾数再平方，占2位。√0 = 0（表示根号0等于0，下同）

√1 = 1

√2 = 1.4142135623731

√3 = 1.73205080756888

√4 = 2

√5 = 2.23606797749979

√6 = 2.44948974278318

√7 = 2.64575131106459

√8 = 2.82842712474619

√9 = 3

√10 = 3.16227766016838

√11 = 3.3166247903554

√12 = 3.46410161513775

√13 = 3.60555127546399

√14 = 3.74165738677394

√15 = 3.87298334620742

√16 = 4

√17 = 4.12310562561766

√18 = 4.24264068711928

√19 = 4.35889894354067

√20 = 4.47213595499958