把被除数和除数同时扩大10倍,商就扩大100倍.______.(判断对错)
根据商不变的性质可得:把被除数和除数同时扩大10倍,商不变,
所以原题说法错误.
故答案为:错误.
信度系数在解释个人分数时的作用包括()。
A.估计误差分数的范围
B.估计真实分数的范围
C.了解实得分数再测时可能的变化情形
D.了解误差分数的大小
After Mary and Caroline covered 25 kilometers that day, their legs________.[ ]
A. gave in
B. gave off
C. gave out
D. gave away