13.7-9.9=?和2.7-(0.32+0.68)=?(要简便计算)
帮我用脱示计算写给我看!
人气:195 ℃ 时间:2019-12-13 10:03:58
解答
13.7-9.9=13.7+0.1-0.1-9.9=13.8-10=3.8
2.7-(0.32+0.68)=2.7-1=1.7
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