35x30-25x25十5x75的简便计算方法是?
35x30-25x25十5x75
=25×42-25×25+15×25
=25×(42-25+15)
=25×32
=800,
请采纳,谢谢.
35x30-25x25十5x75的简便计算方法是
=5x(7x30+75-5x25)
=5x(285-125)
=5x130
=650
35x30-25x25十5x75的简便计算方法是?
35x30-25x25十5x75
=1050-25x25+15x25
=1050-10x25
=1050-250
=800