2025年学习与巩固一年级数学上册人教版第21页答案
$2 + 3 =$ $4 + 1 =$ $0 + 4 =$ $1 + 2 =$ $1 + 1 =$
$3 + 2 =$ $1 + 4 =$ $4 + 0 =$ $2 + 1 =$ $2 - 1 =$
$5 - 2 =$ $5 - 4 =$ $4 - 0 =$ $3 - 1 =$ $2 + 2 =$
$5 - 3 =$ $5 - 1 =$ $4 - 4 =$ $3 - 2 =$ $4 - 2 =$

答案

5 5 4 3 2
5 5 4 3 1
3 1 4 2 4
2 4 0 1 2
$1 + 3 =$ $1 - 1 =$ $0 + 5 =$ $4 - 0 =$ $3 - 0 =$
$3 - 3 =$ $0 + 2 =$ $4 - 4 =$ $2 - 0 =$ $5 - 0 =$
$3 + 1 =$ $5 - 5 =$ $3 + 0 =$ $3 - 2 =$ $2 - 2 =$
$1 - 0 =$ $0 + 0 =$ $4 - 1 =$ $4 - 3 =$ $1 + 0 =$

答案

4 0 5 4 3
0 2 0 2 5
4 0 3 1 0
1 0 3 1 1
1. 比大小。

答案

1. ＜ ＜ ＞ ＞
＞ ＞ = ＜
2. 填一填。
$4 +$◻$= 5$ ◻$- 3 = 1$ ◻$- 3 = 2$ $2 +$◻$= 2$
◻$+ 5 = 5$ $0 +$◻$= 3$ ◻$- 4 = 1$ ◻$+ 3 = 5$

答案

2. 1 4 5 0
0 3 5 2