这篇关于《一年级下册口算题:整十数的减法》，是®无忧考网特地为大家整理的，希望对大家有所帮助！
40-20= 50-20= 80-40= 80-50=
40-20= 50-20= 80-40= 80-50=
80-70= 90-10= 50-10= 50-20=
50-40= 90-40= 80-30= 40-20=
30-20= 80-30= 60-50= 30-20=
70-20= 90-60= 70-40= 50-30=
80-70= 90-10= 50-10= 50-20=
50-40= 90-40= 80-30= 40-20=
30-20= 80-30= 60-50= 30-20=
70-20= 90-60= 70-40= 50-30=
