1 + 1 = 2 1 + 2 = 3 2 + 1 = 3
Trang 33 + 1 = 4 2 + 2 = 4
1 + 3 = 4
3
3 + 1 = 4
1 + 3 = 4
3 + 1 = 4
1 + 3 = 4
2 + 2 = 4
3 3 3
Trang 41 + 3 = 3 + 1 = 1 + 1 =
Bµi 1:
Bµi 2:
TÝnh
+ 2
2
2
+ 1
3
+ 1
1
Bµi 3:
2 + 2 = 2 + 1 = 1 + 2 =
+ 2
1
+ 3
1
4
4
2 + 1
3
1 + 3
3
1 + 1
3
4 1 +
2
4 1 +
3
4 2 +
2
=
>
<
>
=
=
Bµi 3: ViÕt phÐp tÝnh
thÝch hîp
4
4 4
>
<
=
3 + 1 = 4