
2.05x3.8+20.5x4.12+0.205x550如何简算?
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2.05*3.8+20.5*4.12+0.205*550
=2.05*3.8+2.05*41.2+2.05*55
=(3.8+41.2+55)*2.05
=(45+55)*2.05
=100*2.05
=205
=2.05*3.8+2.05*41.2+2.05*55
=(3.8+41.2+55)*2.05
=(45+55)*2.05
=100*2.05
=205
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