兒童九九乘法

一個簡易型的兒童九九乘法，沒有華麗的背景，只有單純的九九乘法與練習。
分為九九乘法表、階梯式背誦、基本練習、進階練習。

階梯式背誦是指重覆的乘法就不用再背誦，例如：2x4與4x2，只需背2x4，
因此，九九乘法從2到9，需要背誦的乘法就越來越少。

基本練習與進階練習以答題的方式來複習背誦的九九乘法。 Simple Jiujiuchengfa a child, no fancy background, only a simple Jiujiushengfa and practice.
Divided multiplication table, stepped recite, basic exercises, advanced exercises.

Stepped recite means repeated multiplication will not need to recite, for example: 2x4 and 4x2, just back 2x4,
Thus, from 2-9 Jiujiuchengfa need to memorize multiplication less and less.

Basic training and advanced training to answer the way to recite the Jiujiushengfa review.