带分数乘法的计算学生容易出错，这既有客观因素，即教材内容本身的难度，也有学生主观上的原因。从教材内容看，计算带分数乘法除“通常”算法之外，还有“简便”算法，针对题目灵活选择算法，把整数运算定律推广运用到分数中，这对培养学生合理、灵活地计算，虽然起到了积极 Calculating students with fractional multiplication is prone to error, both objectively, that is, the difficulty of the textbook itself, and subjective reasons for the student. From the content of teaching materials, the calculation with the fractional multiplication in addition to the “usual” algorithm, there are “simple” algorithm, flexible selection algorithm for the subject, the law of integral arithmetic to promote the use of scores, which students develop a reasonable and flexible calculation, Although played a positive