25x398请问怎样简便计算(
简便运算:25×398 -
25×398 =25x(400-2)=25x400-25x2 =10000-50 =9950
25*398 =25*(400-2)=25*400-25*2 =10000-50 =9950
25×398 =25x(400-2)=25x400-25x2 =10000-50 =9950
25*398 =25*(400-2)=25*400-25*2 =10000-50 =9950
=25×400-25×2 =10000-50 =9550.
398x25 =(400-2)x25 =400x25-2x25 =10000-50 =9950
25x398怎样用简便方法计算 -
25x398 =25x(400-2)=25x400-25x2 =10000-50 =9950
回答:25*4*99.5 =100*99.5 =9950
25x398请问怎样简便计算? -
25x398 =25x(400-2)=25x400-25x2 =10000-50 =9950 满意请采纳谢谢,
25乘以400再减去50
用简便方法计算 25×398 99×46 -
25×398 =25x(400-2)25x400-2x25 =10000-50 =9950 99×46 =(100-1)x46 =100x46-1x46 =4600-46 =4554 谢谢,请采纳,
25x3.9 =25*(4-0.1)100-2.5 =97.5 满意采纳奥,