99.99×77.77+33.33x66.66 简便计算，麻烦写下过程
99.99×77.77+33.33x66.66 简便计算，麻烦写下过程
11.11*9*7*11.11+11.11*3*11.11*6
=（63+18）*11.11*11.11
=81*11.11*11.11
=99.99*99.99
=（100-0.01）^2
=100^2+0.01^2-2*0.01*100
=10000+0.0001-2
=9998.0001
用简便方法计算99.99x77.78+33.33x66.66
99.99x77.78+33.33x66.66 =99.99x(77.78+22.22) =99.99x100 =9999
99.99x1111+33.33x6667的简便计算
＝33.33×3×1111+33.33×6667＝33.33×（3333+6667）＝333300
99.99+33.33*4.2+66.66*1.4简便计算
99.99+33.33*4.2+66.66*1.4
=33.33*3+33.33*4.2+33.33*2*1.4
=33.33*(3+4.2+2.8)
=33.33*10
=333.3
请采纳，谢谢
99.99乘77.78+33.33乘66.66用简便计算怎么算
上式=99.99×（77.78+22.22）=99.99×100=9999
9.999x777.8+33.33x66.66简便运算
9.999x777.8+33.33x66.66
=9.999x777.8+99.99x22.22
=9.999x777.8+9.999x222.2
=9.999x(777.8+222.2)
=9.999x1000.0
=9999
77.77乘0.7 66.66x0.8 33.33x0.1(简便演算法)
77.77×0.7+66.66x0.8+33.33x0.1
=11.11×4.9+11.11x4.8+11.11x0.3
=11.11×（4.9+48.+0.3）
=11.11x10
=111.1
88+99.99-77.77简便计算
88+99.99-77.77
=88+（99·99-77·77）
=88+22·22
=110·22
99.99x1111+33.33x6667 的简便演算法
33.33*(3*1111)+33.33*6667=33.33*(3333+6667)=33.33*10000=333300
3333x6668x6666x6666简便计算
3333x6668+6666x6666
=6666x3334+6666x6666
=6666x（3334+6666）
=6666×10000
=66660000
