Input Output Tables - Addition & Subtraction Rules (Grade 2)
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Input Output Tables - Addition & Subtraction Rules
1.
What is the rule for this input/output table?
Input | Output |
---|---|
18 | 9 |
17 | 8 |
16 | 7 |
15 | 6 |
- add 1
- add 9
- subtract 1
- subtract 9
2.
What is the rule for this input/output table?
Input | Output |
---|---|
9 | 12 |
11 | 14 |
13 | 16 |
15 | 18 |
- add 2
- add 3
- subtract 2
- subtract 3
3.
What is the rule for this input/output table?
Input | Output |
---|---|
15 | 35 |
39 | 59 |
61 | 81 |
78 | 98 |
- add 20
- add 25
- subtract 20
- subtract 25
4.
What is the rule for this input/output table?
Input | Output |
---|---|
33 | 21 |
50 | 38 |
78 | 66 |
91 | 79 |
- add 12
- add 17
- subtract 12
- subtract 17
5.
What is the rule for this input/output table?
Input | 14 | 37 | 42 | 63 |
---|---|---|---|---|
Output | 21 | 44 | 49 | 70 |
- add 5
- add 7
- add 23
- add 35
6.
What is the rule for this input/output table?
Input | 51 | 58 | 64 | 87 |
---|---|---|---|---|
Output | 46 | 53 | 59 | 82 |
- subtract 3
- subtract 4
- subtract 5
- subtract 6
7.
What is the rule for this input/output table?
Input | 22 | 38 | 40 | 57 |
---|---|---|---|---|
Output | 4 | 20 | 22 | 39 |
- add 16
- add 18
- subtract 16
- subtract 18
8.
What is the rule for this input/output table?
Input | 16 | 27 | 52 | 64 |
---|---|---|---|---|
Output | 31 | 42 | 67 | 79 |
- add 11
- add 15
- subtract 11
- subtract 15
9.
What is the rule for this input/output table? Explain how you found the rule.
Input | Output |
---|---|
12 | 31 |
25 | 44 |
38 | 57 |
71 | 90 |
10.
Reggie says the rule for the input/output table is subtract 8. Is Reggie's rule correct? Explain how you know.
Input | Output |
---|---|
42 | 36 |
57 | 51 |
70 | 64 |
85 | 79 |
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