找规律,填空:①101+102+103+104+105=______×______②11+13+15+17+19+21+
来源:学生作业帮 编辑:搜狗做题网作业帮 分类:数学作业 时间:2024/07/13 02:30:42
找规律,填空:
①101+102+103+104+105=______×______
②11+13+15+17+19+21+23=(______+______)×3+______.
①101+102+103+104+105=______×______
②11+13+15+17+19+21+23=(______+______)×3+______.
![找规律,填空:①101+102+103+104+105=______×______②11+13+15+17+19+21+](/uploads/image/z/2419922-2-2.jpg?t=%E6%89%BE%E8%A7%84%E5%BE%8B%EF%BC%8C%E5%A1%AB%E7%A9%BA%EF%BC%9A%E2%91%A0101%2B102%2B103%2B104%2B105%3D______%C3%97______%E2%91%A111%2B13%2B15%2B17%2B19%2B21%2B)
①101+102+103+104+105
=(101+2)+(102+1)+103+103+103
=103+103+103+103+103
=103×5;
②11+13+15+17+19+21+23
=(11+23)+(13+21)+(15+19)+17
=34+34+34+17
=34×3+17
=(11+23)×3+17
故答案为:103,5;11,23,17.
=(101+2)+(102+1)+103+103+103
=103+103+103+103+103
=103×5;
②11+13+15+17+19+21+23
=(11+23)+(13+21)+(15+19)+17
=34+34+34+17
=34×3+17
=(11+23)×3+17
故答案为:103,5;11,23,17.
找规律,填空:①101+102+103+104+105=______×______②11+13+15+17+19+21+
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