小学数学人教2011课标版一年级整十数加、减整十数练习-(2).docx

2.比一比，算一算。
3 +2 = 4 + 5 = 6 – 4 = 7- 3 =
30+20 = 40+50 = 60-40 = 70-30 =

4. 1 +3 +4 = 9– 4 -3 =
10+30+40 = 90-40-30 =