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计算:(1)37×47+36×53;(2)123×76-124×75.
题目详情
计算:
(1)37×47+36×53;
(2)123×76-124×75.
(1)37×47+36×53;
(2)123×76-124×75.
▼优质解答
答案和解析
(1)37×7+36×53
=(36+1)×47+36×53
=36×47+47+36×53
=36×(47+53)+47
=36×100+47
=3600+47
=3647;
(2)123×76-124×75
=(123×75+123)-(123×75+75)
=123×75+123-123×75-75
=123-75
=48.
=(36+1)×47+36×53
=36×47+47+36×53
=36×(47+53)+47
=36×100+47
=3600+47
=3647;
(2)123×76-124×75
=(123×75+123)-(123×75+75)
=123×75+123-123×75-75
=123-75
=48.
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