3.2+3.2+3.2+3.2+3.2改用乘法算式表示是________,這個(gè)乘法算式表示的意義是________.

3.2×5    3.2的5倍是多少
分析:在3.2+3.2+3.2+3.2+3.2中,有5個(gè)3.2,所以改用乘法算式表示是 3.2×5;意義是3.2的5倍是多少.
解答:3.2+3.2+3.2+3.2+3.2改用乘法算式表示是3.2×5,這個(gè)乘法算式表示的意義是3.2的5倍是多少.
故答案為:3.2×5,3.2的5倍是多少.
點(diǎn)評:此題考查了把幾個(gè)相同加數(shù)的算式改成乘法算式的方法,以及對乘法算式意義的考查.
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