2.7*18.3-2.7+2.7*2.7 这道题怎么巧算?

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2.7*18.3-2.7+2.7*2.7这道题怎么巧算?2.7*18.3-2.7+2.7*2.7这道题怎么巧算?2.7*18.3-2.7+2.7*2.7这道题怎么巧算?2.7*18.3-2.7+2.7

2.7*18.3-2.7+2.7*2.7 这道题怎么巧算?
2.7*18.3-2.7+2.7*2.7 这道题怎么巧算?

2.7*18.3-2.7+2.7*2.7 这道题怎么巧算?
2.7*18.3-2.7+2.7*2.7
=2.7x(18.3-1+2.7)
=2.7x20
=54