在学习两位数的数字时，学生可以玩有趣的游戏。
Use this teaching resource in the classroom to reinforce the doubling of two-digit numbers.
学生利用他们的知识将两位数的数字加倍，以沿着百合垫的道路走去，从而解决了一路上的挑战。获胜者是第一个达到终点的人！
在卡片纸上打印游戏以增加耐用性。
This resource includes:
当用作游戏时，游戏很棒数学中心活动.
使用心理策略在20范围内流利地添加并减去。到2年级结束时，从内存中知道所有两个单位数字的总和。
Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
Recall basic facts to add and subtract within 20 with automaticity;
使用基于位置价值，操作的属性以及加法和减法之间的策略，使用涉及1,000范围内的加法和减法的一步和两步问题解决。
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Celebrate the coming of Autumn and practice adding 2-digit numbers with this set of 18 task cards.
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Incorporate this mental math drills booklet into your math lesson warm-up routine.
Use a range of addition and subtraction strategies to solve twenty word problems that contain numbers 1–50.
使用一系列加法和减法策略来解决二十个单位单词问题。
开始学校的一天81 -幻灯片战俘erPoint presentation containing a variety of Reading and Math warm-up activities.
Warm-up your students' brains each day with this 68-slide PowerPoint containing a variety of quick activities.
A set of 40 matching cards to explore the number combinations of 20.
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