2、4乘5、2加0、8乘2、4减2、4 简算
人气:425 ℃ 时间:2020-02-03 19:19:10
解答
2.4x5.2+0.8x2.4-2.4
=2.4x(5.2+0.8-1)
=2.4x5
=12
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