三年级分数加减法题40道 1-1/3= 7/8-1/8= 1-3/6= 1-1/4= 9/25+7/25= 25/36+11/36= 29/33+13/66= 5/9+7/18= 9/10+13/5= 7/15+7/20= 5/9+2/7= 5/9-7/18= 6/5/2.4= 2/[13/10]= 6/9+1/9= 7/9-4/9= 6/9-1/4= 3/6+3/7= 5/8-1/2= 8/9+2/3= 1/3+1/3= 1-2/5= 5/8-3/8= 1/7+3/7+2/7= 1-5/6= 3/8+5/8= 2/9+5/9= 3/4-1/2= 1/6+2/3= 1-5/12-7/12= 1/2-1/3= 3/8+3/8-5/8= 8/9-1/6+2/3= 1/4+5/6-3/4= 1-(3/4-2/5)= 1/3+2/5+3/5+2/3= 1/2+2/5= 1/6+2/3= 6/7-7/6= 8/9+3/5= 本文来源：https://www.wddqw.com/doc/1567ec052c60ddccda38376baf1ffc4ffe47e20c.html