主题
描述
还记得你的乘法表吗？……我也不记得了。运用这个激动人心的游戏来复习你的乘法、除法以及因子分解的能力。不允许使用计算器哦！
示范 学习目标
- 解释乘法表是如何促进乘法、因子以及分解的理解。提高乘法、因子分解、除法的精确度。
标准对齐
Common Core - Math
3.OA.A.1
Interpret products of whole numbers, e.g., interpret 5 × 7 as the total number of objects in 5 groups of 7 objects each. For example, describe a context in which a total number of objects can be expressed as 5 × 7.
3.OA.A.2
Interpret whole-number quotients of whole numbers, e.g., interpret 56 ÷ 8 as the number of objects in each share when 56 objects are partitioned equally into 8 shares, or as a number of shares when 56 objects are partitioned into equal shares of 8 objects each. For example, describe a context in which a number of shares or a number of groups can be expressed as 56 ÷ 8.
3.OA.A.4
Determine the unknown whole number in a multiplication or division equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 × ? = 48, 5 = _ ÷ 3, 6 × 6 = ?
3.OA.B.5
Apply properties of operations as strategies to multiply and divide.2 Examples: If 6 × 4 = 24 is known, then 4 × 6 = 24 is also known. (Commutative property of multiplication.) 3 × 5 × 2 can be found by 3 × 5 = 15, then 15 × 2 = 30, or by 5 × 2 = 10, then 3 × 10 = 30. (Associative property of multiplication.) Knowing that 8 × 5 = 40 and 8 × 2 = 16, one can find 8 × 7 as 8 × (5 + 2) = (8 × 5) + (8 × 2) = 40 + 16 = 56. (Distributive property.)
3.OA.B.6
Understand division as an unknown-factor problem. For example, find 32 ÷ 8 by finding the number that makes 32 when multiplied by 8.
3.OA.C.7
Fluently multiply and divide within 100, using strategies such as the relationship between multiplication and division (e.g., knowing that 8 × 5 = 40, one knows 40 ÷ 5 = 8) or properties of operations. By the end of Grade 3, know from memory all products of two one-digit numbers.
3.OA.D.9
Identify arithmetic patterns (including patterns in the addition table or multiplication table), and explain them using properties of operations. For example, observe that 4 times a number is always even, and explain why 4 times a number can be decomposed into two equal addends.
版本 1.0.24
HTML5 程序：
新的HTML5类型的程序可以在iPad，Chromebook以及PC端（包含mac和linux系统）上运行。
iPad:
iOS 8+ Safari
iPad2或之后的iPad产品支持HTML5类型的程序。如果您是iPad用户，请点击这里。
Android:
无官方支持。如果您需要在安卓平台运行HTML5程序，我们建议您使用最新版本的谷歌浏览器和安卓4.1+版本。
Chromebook:
您只需要最新版本的谷歌浏览器。HTML5和flah程序都可以在所有Chromebook上运行。如果您是Chromebook用户，请点击这里。
Windows 系统:
微软浏览器，IE11浏览器，火狐浏览器和谷歌浏览器的最新版本都可以运行HTML5程序。
Macintosh 系统:
OS 10.9.5 或之后的系统版本，Safari 9+版本，或者火狐浏览器，谷歌浏览器的最新版本均支持我们的程序。
Linux 系统:
无官方支持。请联系phethelp@colorado.edu。
Java and Flash 程序：
Java 与 Flash程序可以在PC端，mac端，及linux系统上运行。具体的系统配置要求如下：
Windows 系统:
Windows 10, 8.1, 7
内存: 256 MB
浏览器: 微软Edge浏览器，IE 11浏览器，火狐浏览器，谷歌浏览器
Macintosh 系统:
Mac OS X 10.9.5+
使用管理员身份以便安装
64位浏览器（例如Safari，火狐，谷歌等）
Linux 系统:
Oracle Linux 5.5+1
Oracle Linux 6.x (32位), 6.x (64位)2
Oracle Linux 7.x (64位)2
Red Hat Enterprise Linux 5.5+1, 6.x (32位), 6.x (64位)2
Ubuntu Linux 12.04 LTS, 13.x
Suse Linux Enterprise Server 10 SP2+, 11.x
浏览器: 火狐，谷歌
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