作业帮23.1×160-46.2×70简便运算
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/03 04:07:36
23.1×160-46.2×70简便运算
23.1×160-46.2×70简便运算
23.1×160-46.2×70简便运算
23.1X160-23.1X140
=23.1X[160-140]
=23.1X20
=462
=23.1×2×80-46.2×70
=46.2×80-46.2×70
=46.2×（80-70）
=46.2×10
=462
23.1×160-46.2×70
=23.1×160-23.1×(2×70)
=23.1×160-23.1×140
=23.1×(160-140)
=23.1×20
=462