205x28-3930÷300 简便运算
问题描述:
205x28-3930÷300 简便运算
答
=(41×5)×(7×4)-(3930÷3)÷(300÷3)
=(41×7)×(5×4)-1310÷100
=287×20-13.1
=5740-13.1
=5726.9