70.1-41.89+2.78怎样简便运算(快点)
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/15 04:01:17
70.1-41.89+2.78怎样简便运算(快点)
70.1-41.89+2.78
=70.1+2.78-41.89
=72.88-41.89
=72.88-41.88-0.01
=30.99
=70.1-(41.89-2.78)
=70.1-39.11
=30.99
70.1—(41.89—2.78)
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来源:学生作业帮助网 编辑:作业帮 时间:2024/05/15 04:01:17
70.1-41.89+2.78怎样简便运算(快点)
70.1-41.89+2.78
=70.1+2.78-41.89
=72.88-41.89
=72.88-41.88-0.01
=30.99
=70.1-(41.89-2.78)
=70.1-39.11
=30.99
70.1—(41.89—2.78)