2026年暑假作业天天练文心出版社一年级数学人教版第31页答案
一、口算。
50 + 40 =
60 - 30 =
70 - 60 =
30 + 50 =
90 - 70 =
20 + 40 =
40 - 30 =
30 + 20 =
16 - 8 =
90 - 50 =
14 - 4 =
17 - 9 =

答案

50 + 40 = 90
60 - 30 = 30
70 - 60 = 10
30 + 50 = 80
90 - 70 = 20
20 + 40 = 60
40 - 30 = 10
30 + 20 = 50
16 - 8 = 8
90 - 50 = 40
14 - 4 = 10
17 - 9 = 8
二、找朋友，连一连。

答案

30+40=70
90-30=60
20+30=50
10+50=60
70-20=50
80-10=70
连线：
30+40 —— 80-10
90-30 —— 10+50
20+30 —— 70-20
三、里面藏着几？
+ 20 = 60
- 80 = 10
- 40 = 50
20 + = 50
30 + = 70
+ 40 = 70
- 10 = 70
70 - = 20
90 - = 30

答案

40 90 90 30 40 30 80 50 60
四、看图，写出4道算式。
1.
□○□=□ □○□=□

答案

30 + 40 = 70
40 + 30 = 70
70 - 30 = 40
70 - 40 = 30