（7.88加6.77加5.66）乘（9.31加10.98加10）减（7.88加6.77加5.66加10）乘（9.13加1
答案:1 悬赏:70 手机版
解决时间 2021-03-28 09:20
- 提问者网友：ミ烙印ゝ
- 2021-03-28 01:16
（7.88加6.77加5.66）乘（9.31加10.98加10）减（7.88加6.77加5.66加10）乘（9.13加1
最佳答案
- 五星知识达人网友：山君与见山
- 2021-03-28 01:26
(7.88+6.77+5.66)*(9.31+10.98+10)-(7.88+6.77+5.66+10)*(9.13+10.98)
=(7.88+6.77+5.66)*(9.31+10.98+10)-(7.88+6.77+5.66)*(9.13+10.98)+10*(9.13+10.98)
=(7.88+6.77+5.66)*[(9.31+10.98+10-(9.13+10.98)]+10*(9.13+10.98)
=10*(7.88+6.77+5.66)+10*(9.13+10.98)
=10*(7.88+6.77+5.66+9.13+10.98)
=(7.88+6.77+5.66)*(9.31+10.98+10)-(7.88+6.77+5.66)*(9.13+10.98)+10*(9.13+10.98)
=(7.88+6.77+5.66)*[(9.31+10.98+10-(9.13+10.98)]+10*(9.13+10.98)
=10*(7.88+6.77+5.66)+10*(9.13+10.98)
=10*(7.88+6.77+5.66+9.13+10.98)
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