In the last two months they have been working on Multiplication and Division. Addition and Subtraction are the subjects two months ago.
最近的两个多月他们一直在学习乘除法，加减法是两个多月前学的。They generally do well in additions and subtractions of numbers short than 20, but few knew what multiplication or division is.
同学们对20以内数的加减法掌握较熟，而大部分都不知乘除为何物。Math Ninja offers drills on multiplication and division.
“数学忍者”提供乘除运算的练习。If you have bigger kids that already know how to add and subtract you could work on division and multiplication problems using the chalk.
如果你的孩子大一些已经学会加减法了，你还可以通过这种方式让他们来学习乘除法。Can not calculate, push hackberrya today, but the total lunar eclipse, not poor mentalistic mouth recite a calculate.
卫朴能够不用数码推算古今的日蚀、月蚀，只用口算乘除，没算错一个数字。Relationships between the parts of multiplicationand division
乘除法各部分之间的关系The condition of multiplicating and dividing the convergence in measure of the measurable function sequence on infinite measurable set
可测函数列在无限测度集上依测度收敛乘除成立的条件Design and Implementation of Fast Computation for Multiplication and Division Embedded in RISC Processor
一种RISC微处理器的快速乘除法运算设计与实现Fast Serial Computation for Combined Multiplication, Division and Square Root
用进位存储加法器快速实现串行乘除法和平方根计算