2026年云南省标准教辅同步指导训练与检测一年级数学下册人教版第34页答案
一、口算。
40 + 50 = 10 + 20 = 10 + 50 =
20 + 70 = 50 + 4 = 60 + 4 =
90 + 3 = 60 - 30 = 70 - 20 =
98 - 8 = 87 - 80 = 63 - 60 =
45 - 5 = 32 - 2 = 54 - 50 =

答案

40 + 50 = 90
10 + 20 = 30
10 + 50 = 60
20 + 70 = 90
50 + 4 = 54
60 + 4 = 64
90 + 3 = 93
60 - 30 = 30
70 - 20 = 50
98 - 8 = 90
87 - 80 = 7
63 - 60 = 3
45 - 5 = 40
32 - 2 = 30
54 - 50 = 4
二、填一填。
45= 40 + 36 = 30 + + 4 = 54
+ 7 = 67 67 - = 60 8 = 28 -

答案

5
6
50
60
7
20

解析

45 - 40 = 5
□=5
36 - 30 = 6
□=6
54 - 4 = 50
□=50
67 - 7 = 60
□=60
67 - 60 = 7
□=7
28 - 8 = 20
□=20
最终
三、填表。

|商品|原有|卖出|还剩|
|----|----|----|----|
||87条|7条|(
)条|
||(
)件|40件|8件|
||39条|(
)条|9条|

答案

87 - 7 = 80(条)
40 + 8 = 48(件)
39 - 9 = 30(条)
答:还剩80条;原有48件;卖出30条。
四、括号里最大能填几?
30 + (
) < 39 14 - (
) > 10 (
) + 80 < 84
18 - (
) > 10 70 + (
) < 72 14 - (
) > 8

答案

39-30=9,9-1=8
30+(8)<39
14-10=4,4-1=3
14-(3)>10
84-80=4,4-1=3
(3)+80<84
18-10=8,8-1=7
18-(7)>10
72-70=2,2-1=1
70+(1)<72
14-8=6,6-1=5
14-(5)>8