4x15/2= 12/5x8= 3/1x4/1= 9/8x10= 6x12/11= 9/2x5/3= 14/6x9/7= 8/5x15/4= 20/9x21/5=
问题描述：
4x15/2= 12/5x8= 3/1x4/1= 9/8x10= 6x12/11= 9/2x5/3= 14/6x9/7= 8/5x15/4= 20/9x21/5=
3/11x2/1= 50/19x19/10= 24/13x26/8= 40/11x22/10= 100/16x16/25= (这些是那一块的）3/1x5/3+2= 2/1+3/1x5/2= 14/9x3/1+3/2= 7/5-9/5x7/5= 1-7/5x25/21= 6/1x(5-3/2)= 8/7x7+8/3= (6+5/2)x8/3= (这些要计算的,不能直接等答案）
答
3/11x2/1=6\11 50/19x19/10= 5 24/13x26/8=6 40/11x22/10=8 100/16x16/25=4 3/1x5/3+2=5+2=7 2/1+3/1x5/2=2+7.5=9.5 14/9x3/1+3/2=14\3+3\2=37\6 7/5-9/5x7/5=-28\25 1-7/5x25/21=1-5\3=-2\3 6/1x(5-3/2)=6x-7\2=-21...