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