The plus sign is used in addition and the minus is used in subtraction.加号用于加法;减号用于减法....using concrete objects to teach addition and subtraction.用实物来教加减法There will be simple tests in addition, subtraction, multiplication...
在有限维空间中可以运用行列式.For finite - dimensional spaces determinants can be brought into play.这个行列式是两个行列式的结式的特殊情形.This determinant is a special case of the resultant of two polynomials.行列式可根据任何一列余因子来求算.The determinant can be eval...