题目内容
8.4÷5×（5×2）=________．
16.8
分析：本题可以根据乘法交换律及结合律进行计算．
解答：8.4÷5×（5×2）
=8.4×5÷5×2，
=8.4×（5÷5）×2，
=8.4×1×2，
=16.8．
故答案为：16.8．
点评：完成四则混合运算题目时要认真分析式中数据，能利用运算定律简算的要进行简算．
分析：本题可以根据乘法交换律及结合律进行计算．
解答：8.4÷5×（5×2）
=8.4×5÷5×2，
=8.4×（5÷5）×2，
=8.4×1×2，
=16.8．
故答案为：16.8．
点评：完成四则混合运算题目时要认真分析式中数据，能利用运算定律简算的要进行简算．
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