Question

用简便方法计算99x78+33x66？

Answer 1

你好这个题很简单的
99x78+33x66
=99x78+33x3X22
=99x（78+22）
=99X100
=9900

Answer 2

=99×78+33×3×22
=99×78+99×22
=99×（78+22）
=99×100
=9900

Answer 3

变换后提出公因数99
99×78+33×66
=99×78+33×3×22
=99×78+99×22
=99×(78+22)
=99×100
=9900

Answer 4

99×78+33×66
=99×78+11×3×11×6
=99×78+11×3×11×2×3
=99×78+11×9×11×2
=99×78+99×22
=99×（78+22）
=99×100
=9900

Answer 5

99x78+33x66
=99x78+33x3X22
=99x（78+22）
=99X100
=9900