5.04*6.5-2.76=(简便运算)

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5.04*6.5-2.76=(简便运算)5.04*6.5-2.76=(简便运算)5.04*6.5-2.76=(简便运算)5.04*6.5-2.76=(5+0.04)*13/2-2.76=(5*13+0

5.04*6.5-2.76=(简便运算)
5.04*6.5-2.76=(简便运算)

5.04*6.5-2.76=(简便运算)
5.04*6.5-2.76 = ( 5 + 0.04) * 13 / 2 - 2.76 = (5 * 13 + 0.04 * 13) /2 - 2.76 = (65 + 0.52) /2 - 2.76 = 65.52 /2 - 2.76 = 32.76 - 2.76 = 30