9.99*7.78+6.66*3.33
计算9.99×7.78 3.33×6.66? -
9.99x7.78+3.33x6.66 =（3.33x3x7.78）3.33x6.66 =（3.33x.23.34）3.33x6.66 =3.33x（23.34+6.66）3.33x30 =99.9（乘法分配律）
9.99×7.78+3.33×6.66 =9.99×7.78+3.33×3×2.22 =9.99×7.78+9.99×2.22 =9.99×(7.78+2.22)=9.99×10 =99.9 乘法分配律简便计算中最常用的方法是乘法分配律。乘法分配律指的是ax(b+c)=axb+axc其中a,b,c是任意实数。相反的，axb+axc=ax(b+c)叫做乘法分配律的是什么。
9.99x7.78+3.33x6.66 =（3.33x3x7.78）3.33x6.66 =（3.33x.23.34）3.33x6.66 =3.33x（23.34+6.66）3.33x30 =99.9（乘法分配律）
9.99×7.78+3.33×6.66 =9.99×7.78+3.33×3×2.22 =9.99×7.78+9.99×2.22 =9.99×(7.78+2.22)=9.99×10 =99.9 乘法分配律简便计算中最常用的方法是乘法分配律。乘法分配律指的是ax(b+c)=axb+axc其中a,b,c是任意实数。相反的，axb+axc=ax(b+c)叫做乘法分配律的是什么。
正解，
9.99*7.78+3.33*6.66 =9.99*7.78+2.22*9.99 =9.99*（7.78+2.22）9.99*10 =99.9
9.99×7.78+6.66×3.33 -
=9.99×7.78+2.22×3×3.33 =9.99×7.78+2.22×9.99 =9.99(7.78+2.22)=9.99×10 =99.9
9.99×7.78+6.66x3.33 = 9.99×7.78+2.22x9.99 = 9.99×(7.78+2.22)= 9.99X10 = 99.9
9.99×7.78+6.66x3.33简便计算解说? -
简便运算过程如下：1、提取原式：9.99×7.78+6.66×3.33 2、计算过程：9.99×7.78+2.22×( 3x3.33 )=9.99×7.78+2.22×9.99 =9.99×（7.78+2.22)=9.99×10 =99.9 3、计算结果：99.9 4、谢谢，期待您的采纳。
9.99*7.78+3.33*6.66 =9.99*7.78+2.22*9.99 =9.99*（7.78+2.22）=9.99*10 =99.9 =3.33×3×7.78+3.33×6.66 =3.33
99.9x7.78十3.33x6.66怎么简便计算 -
9.99x7.78+3.33x6.66 =9.99×7.78+3.33×3×2.22 =9.99×7.78+9.99×2.22 =9.99×(7.78+2.22)=9.99×10 =99.9
9.99*7.78+3.33+6.66这道题的简算怎么算？ 解：9.99*7.78+3.33+6.66 =9.99*7.78+9.99 =9.99*（7.78+1） =9.99*8.78 =（10-0.01）8.78 =87.8-0.0878=87.7122 9.99×7.78+6.66×3.33巧算 9.99×7.78+6.66×3.33 =9.99×7.78+2.22×9还有呢？