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5.2x1.8+0.52x2简便运算=5.2x1.8+5.2x0.2=(1.8+0.2)x5.2=2x5.2=10.4=5.2x
5.2x1.8+0.52x2简便运算
5.2x1.8+0.52x2简便运算
5.2x1.8+0.52x2简便运算
=5.2x1.8+5.2x0.2
=(1.8+0.2)x5.2
=2x5.2
=10.4
=5.2x1.8+5.2x0.2
=(1.8+0.2)x5.2
=2x5.2
=10.4
5.2x1.8+5.2x0.1x2
=5.2x(1.8+0.2)
=5.2x2
=10.4
5.2x1.8+0.52x2简便运算
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