6.26x9.9=6.26x(10-0.1)=6.26x10-6.26x0.1=62.6-0.626=61.974采纳哦,谢谢。记得采纳哦。
6.26×9.9=6.26×(10-0.1)=62.6-0.626=61.974。
=6.29×10-6.29×0.1=62.9-0.629=62.271