是的，几何上两个向量相加,你就把一个向量的尾巴,放到另一个向量的头上去,那就是“头尾”加法,还有问题么？
Exactly. To add vectors geometrically you just put the head of the first vector and the tail of the second vector in the same place And then, it's head to tail addition Any other questions?
在数学方面，绿色小星星和他的朋友示范几何，加法和减法，10以内的数字，音乐和其它。
In math, little green star and his friends demonstrate geometry, addition and subtraction, sets of 10s, music and more.
其中应用题中含盖的范围有：计算方法、系统学、几何学、测量和使用加法和减法。
Areas covered include numeration, number systems, geometry, measurement, and the use of addition and subtraction in word problems.
教加法、减法、乘法、钱和几何。
Teaches addition, subtraction, multiplication, money and geometry.
教加法、减法、乘法、钱和几何。
Teaches addition, subtraction, multiplication, money and geometry.
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