1997+199.7+19.97+1.997+0.1997+0.01997
1997+199.7+19.97+1.997+0.1997+0.01997
1997+199.7+19.97+1.997+0.1997+0.01997怎么简便计算?
31*19.97+199.7*6.8+199.7*0.1= 简算
199.9*19.98-199.8*19.97
计算19.97×95+19.97×5的最简便方法是什么
1999*199.8-1998*199.7怎么简便
200.1*19.99-20.01*199.7-2.001*1.998=
简算:19.99乘19.98-19.97乘19.96
19.99×19.98-19.97×19.96简便运算
简便计算;19.99*19.98-19.97*19.96
计算:1.996+19.97+199.8=______.
1.916+19.97+199.8的简便计算