Question

急求50道分数加减法口算题，25道同分母，25道异分母，一步的

Answer 1

6/5-4/2= 3/2-2/1= 4/1+3/2=
5/3-3/1= 8/4-6/1= 3/5-4/3=
6/2+3/1= 9/5-2/1= 7/2+3/1=
5/2-6/2= 4/2+2/1= 8/3-5/1=
9/3-3/1= 12/7-8/3= 5/2+3/1=
1-9/4= 9/5+9/8= 8/1+8/7=
24/19-24/13= 36/19+36/3=
7/3+7/4= 8/11-8/1= 4/1-9/1=
13/12-13/3= 9/8-9/1= 1-6/1=
4/3+4/1= 8/7-8/3= 9/2+8/3=
7/2+2/1= 6/2-7/1= 3/2-4/1=
8/2-13/2= 5/1+7/1= 3/1+2/1=
4/1+2/1= 2/1-5/1= 7/5+8/1=
5/2-3/1= 6/1+5/2= 9/5+8/1=
4/1-6/1= 5/2+7/1= 6/1+2/1=
9/2-12/3= 3/2+8/1= 5/2-3/1=
3/1-4/1= 9/2+2/1= 2/1+8/4=
1/4+1/8= 2/3-1/6= 3/7+5/14=
2/5-2/15= 7/8-9/16= 1/32+1/4=
2/9+7/9= 3/4-9/16= 25/32-3/8=
3/5+13/15= 23/25+1/5=

21/25-1/5=
3/14+2/7=
2/3+1/9=
5/7-3/14=
7/9+1/18=
19/21+3/7=
23/35-1/5=
3/4+1/16=
3/8-1/16=
5/9+4/9=
一定要选我

Answer 2

加自然数,分母写相同,分子相减;异分母你写3/8-1/4,就等于3/8-2/8,以此类推,明白了吗?