题目内容
0.4×4.7×2.5+（2
+5.3）．
解：0.4×4.7×2.5+（2+5.3）
=0.4×2.5×4.7+（2+5.3），
=1×4.7+
，
=4.7+，
=12．
分析：根据乘法交换律，可交换4.7与2.5的位置，然后再依据分数的四则混合运算进行计算即可得到答案．
点评：此题主要用到的知识点是乘法交换律和分数的四则混合运算．
+5.3）=0.4×2.5×4.7+（2
+5.3），=1×4.7+
，=4.7+
，=12
．分析：根据乘法交换律，可交换4.7与2.5的位置，然后再依据分数的四则混合运算进行计算即可得到答案．
点评：此题主要用到的知识点是乘法交换律和分数的四则混合运算．
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