1
Balance the scale: 9 + 5 11 + ? =
2
Balance the scale: 10 + 7 8 + ? =
3
Balance the scale: 1 + __ 9 =
4
If left side 3 × 2, what does the right side equal to balance the scale? =
5
Balance the scale: 9 + 1 9 + ? =
6
Balance the scale: 7 + 4 5 + ? =
7
If left side 4 × 9, what does the right side equal to balance the scale? =
8
Balance the scale: 3 + __ 4 =
9
Balance the scale: 3 + __ 7 =
10
Balance the scale: 1 + __ 3 =
11
Balance the scale: 9 + 1 1 + ? =
12
Balance the scale: 2 + __ 8 =
13
Balance the scale: 9 + 3 4 + ? =
14
Balance the scale: 2 + __ 3 =
15
Balance the scale: 1 + __ 6 =
16
Balance the scale: 5 + __ 6 =
17
Balance the scale: 7 + 7 4 + ? =
18
Balance the scale: 5 + 4 5 + ? =
19
Balance the scale: 2 + __ 5 =
20
If left side 9 × 10, what does the right side equal to balance the scale? =