(7.88+6.77+5.66)×(9.31+10.98+10)—(7.88+6.77+5.66+10)×(9.31+10.98)怎么做

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(7.88+6.77+5.66)×(9.31+10.98+10)—(7.88+6.77+5.66+10)×(9.31+10.98)怎么做
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(7.88+6.77+5.66)×(9.31+10.98+10)—(7.88+6.77+5.66+10)×(9.31+10.98)怎么做
(7.88+6.77+5.66)×(9.31+10.98+10)—(7.88+6.77+5.66+10)×(9.31+10.98)怎么做

(7.88+6.77+5.66)×(9.31+10.98+10)—(7.88+6.77+5.66+10)×(9.31+10.98)怎么做
简便算法为:=(7.88+6.77+5.66)*[(9.31+10.98+10)-(9.31+10.98)]-10*(9.31) .然后按照这个算下去