1.
Find the missing number.
4 + ___ = 8
8 − 4 = ___
A.
5
B.
4
C.
2
D.
3
Hint
2.
Find the missing number.
3 + ___ = 6
6 − 3 = ___
A.
3
B.
1
C.
4
D.
2
Hint
3.
Find the missing number.
5 + ___ = 10
10 − 5 = ___
A.
4
B.
6
C.
3
D.
5
Hint
4.
Find the difference.
18 − 9 = ___
A.
10
B.
8
C.
11
D.
9
Hint
5.
Find the difference.
2 − 1 = ___
A.
2
B.
0
C.
1
D.
3
Hint