用简便算方计算,49×49-51+49×51
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 15:08:21
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用简便算方计算,49×49-51+49×51
用简便算方计算,49×49-51+49×51
用简便算方计算,49×49-51+49×51
49×49-51+49×51
=49×49+49×51-51
=49×(49+51)-51
=4900-51
=4849
49×49-51+49×51
=49×49+49×51-51
=(49+51)x49-51
=100x49-51
=4900-51
=4849
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