4.7×2.8+2.5×2.8+7.2×7.2（用简便方法计算）

要有过程

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您好：清兆

4.7×2.8+2.5×2.8+7.2×7.2
=（4.7+2.5）x2.8+7.2x7.2
=7.2x2.8+7.2x7.2
=7.2x(2.8+7.2)
=72

不明答纳租白，可以追问
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谢谢 祝学习进步！茄哪

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4.7×2.8+2.5×2.8+7.2×7.2

=（4.7+2.5）历团×2.8+7.2×7.2
=7.2×2.8+7.2×7.2
=7.2×（肢敬橘稿瞎2.8+7.2）
=72

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＝（4.7+2.5）×2.8+7.2×2.7=7.2×2.8+7.2×7.2=7.2×（2.8+7.2）=72

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你蔽此春好：

4.7×2.8+2.5×2.8+7.2×7.2

=（4.7+2.5）×2.8+7.2×7.2
=7.2×2.8+7.2×7.2
=7.2×（2.8+7.2）宏耐扒配
=7.2×10
=72

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4.7*2.8=+
2.5*2.8=+
7.2*7.2=+
=72

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