三年级分子分母口算题

1/3+2/3= （5/6-1/4）*5/6= 3/7*7/6-1/2= 4/9+1/3= 16/15-2/3= 3/4*4/5= 1/2-3/7= 3+9/10+3/2= 3/4-15/8= 1/2+1/4+1/8+1/16= 3/8*2/9+1= (1/3+5/6)*1/7= 121/100-12/10= 1/3+3/4= 16/7-3/14= 99/26*13/11= 1/2+3/2+4/3= 1+3/8*2/3= 19/9-4/3= 28/11+2= 2/3*6/7= 5/6*2/3-3= 1/8+7/4= (5/6-1/3)*3= 2/9+3/4= 19*1/8+1/2= 2/5+7/10= 3/4-17/8*2/3= 1/2-3/2+3/4= 99/100+1/10=