5.01+5.02+5.03+5.04+5.05+.5.99为什么等于=544.5
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5.01+5.02+5.03+5.04+5.05+.5.99为什么等于=544.5
![5.01+5.02+5.03+5.04+5.05+.5.99为什么等于=544.5](/uploads/image/z/4451963-59-3.jpg?t=5.01%2B5.02%2B5.03%2B5.04%2B5.05%2B.5.99%E4%B8%BA%E4%BB%80%E4%B9%88%E7%AD%89%E4%BA%8E%3D544.5)
5.01+5.02+5.03+5.04+5.05+.5.99
=(5.01+5.99)×99÷2
=11×99÷2
=544.5
=(5.01+5.99)×99÷2
=11×99÷2
=544.5