Question

小学异分母加减法口算题三百道

Answer 1

3/4+1/5=4/5 3/4-1/5=11/20 5/6+2/9=19/18 5/6-2/9=11/18
2/3+3/5=19/15
2/3-3/5=1/15 6/7+1/2=19/14 6/7-1/2=5/14
2/3+1/6=5/6 1/3+1/4=7/12
1/3-1/4=1/12 1/5+1/7=12/35
1/5-1/7=2/35 1/4+1/9=13/36 1/4-1/9=5/36
1/8+1/9=17/72
1/8-1/9=1/72 1/10+7/9=79/90 5/7-1/6=23/42 1-5/9=4/9
1/5+3/8=23/40 3/4+1/5=19/20 2/3-3/5=1/5 1-2/5=3/5
5/8-1/9=37/72
1/10-1/20=1/20 1/6+3/8=13/

Answer 2

建议自己买本教辅书……