1.
Use doubles to add.
4 + 4 =
A.
6
B.
7
C.
8
D.
5
Hint
2.
Use doubles to add.
5 + 5 =
A.
9
B.
8
C.
7
D.
10
Hint
3.
Use doubles to subtract.
10 − 5 =
A.
4
B.
2
C.
6
D.
5
Hint
4.
Use doubles to subtract.
12 − 6 =
A.
6
B.
5
C.
7
D.
8
Hint