9.5×2.1−9.5÷2.1+10.5×2.1−10.5÷2.1

来源：学生作业帮助网编辑：作业帮时间：2024/11/29 23:22:01

x��)��3=<�H�PM��j�J�� "}2t��6�.[�6u0�k��ԧ U��j5��k�E�#L62�Hi��B��.`l��/.H̳�'��z�

9.5×2.1−9.5÷2.1+10.5×2.1−10.5÷2.1
9.5×2.1−9.5÷2.1+10.5×2.1−10.5÷2.1

9.5×2.1−9.5÷2.1+10.5×2.1−10.5÷2.1
9.5×2.1−9.5÷2.1+10.5×2.1−10.5÷2.1
=9.5×2.1+10.5×2.1−9.5÷2.1−10.5÷2.1
=(9.5×2.1+10.5×2.1)−(9.5÷2.1+10.5÷2.1)
=(9.5+10.5)×2.1-(9.5+10.5)÷2.1
=20×2.1-20÷2.1
=42-(210-10)/21
=42-10+10/21
=32又10/21