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7.58+6.5+4.42=6.5+(7.58+4.42)
正确
正确
分析:根据题意,由加法交换律和结合律进行解答即可.
解答:解:
7.58+6.5+4.42,
=6.5+(7.58+4.42),
=6.5+12,
=18.5.
故答案为:正确.
点评:考查了加法交换律和结合律的运用,然后再进一步解答即可.
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