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10.1×87-0.91×87的简便运算

题目详情
10.1×87-0.91×87的简便运算
▼优质解答
答案和解析
=(10.1-0.91)*87
=(10+0.1-1+0.09)*87
=870+8.7-87+(0.1*87-0.01*87)
=870+8.7-87+8.7-0.87
=870+8.7+8.7-87.87
=887.4-87.87
=799.53