简算9.99*7.78+3.33*6.66
简算9.99*7.78+3.33*6.66
9.99*7.78+3.33*6.66
=9.99*7.78+9.99*2.22
=9.99*(7.78+2.22)
=99.9
9.99×7.78+3.33×6.66巧算
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
9.99乘7.78+3.33乘6.66，简便运算。
你好
9.99x7.78+3.33x6.66
=9.99x7.78+3.33x3x2.22
=9.99x7.78+9.99x2.22
=9.99x（7.78+2.22）
=9.99x10
=99.9
9.99*7.78+3.33*6.66的简便方法怎样算
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+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+2.22×9.99
=9.99×(7.78+2.22)
=9.99×10
=99.9。
9.99*7.88+3.33*6.66简算
您好！
9.99×7.88+3.33×6.66
=9.99×7.88+9.99×2.22
=9.99×（7.88+2.22）
=9.99×10.1
=9.99×（10+0.1）
=9.99×10+9.99×0.1
=99.9+0.999
=100.899
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
