5.2x1.8+0.52x2简便运算
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5.2x1.8+0.52x2简便运算
![5.2x1.8+0.52x2简便运算](/uploads/image/z/20138654-38-4.jpg?t=5.2x1.8%2B0.52x2%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97)
=5.2x1.8+5.2x0.2
=(1.8+0.2)x5.2
=2x5.2
=10.4
=(1.8+0.2)x5.2
=2x5.2
=10.4
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