45*44/43怎么算?
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![45*44/43怎么算?](/uploads/image/z/436237-61-7.jpg?t=45%2A44%2F43%E6%80%8E%E4%B9%88%E7%AE%97%3F)
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45*44/43怎么算?
45*44/43怎么算?
45*44/43怎么算?
45*(43/44)=45*43/44=[(44+1)*(44-1)]/44 因为(a+b)*(a-b)=a^2-b^2 所以(44^2-1)/44=[44(44-1/44)]/44=44-1/44