题目

根据运算定律填空。6.8×2.56＝____×____1.32×2.5×0.4＝____×（____×____）5.7×3.8＋4.3×3.8＝（____＋____）×____25×4.4＝25×____＋25×____ 答案：【答案】2.56 6.8 1.32 2.5 0.4 5.7 4.3 3.8 4 0.4 【解析】整数乘法运算定律同样适用于小数。乘法交换律：a×b＝b×a乘法结合律：a×b×c＝a×（b×c）乘法分配律：（a＋b）×c＝a×c＋b×c或（a－b）×c＝a×c－b×c由分析得：①小题可应用交换律：6.8×2.56＝2.56×6.8②小题可应用结合律：1.32×2.5×0.4＝1.32×（2.5×0.4）③小 If you go to the souvenir shops in places of interest, sometimes you can’t help ________ into buying something fake.    A. to persuade                B. persuading    C. be persuaded              D. being persuaded