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?
InputOutput
189
178
167
156
  1. add 1
  2. add 9
  3. subtract 1
  4. subtract 9
 
2. 
What is the rule for this input/output table?
InputOutput
912
1114
1316
1518
  1. add 2
  2. add 3
  3. subtract 2
  4. subtract 3
3. 
What is the rule for this input/output table?
InputOutput
1535
3959
6181
7898
  1. add 20
  2. add 25
  3. subtract 20
  4. subtract 25
 
4. 
What is the rule for this input/output table?
InputOutput
3321
5038
7866
9179
  1. add 12
  2. add 17
  3. subtract 12
  4. subtract 17
5. 
What is the rule for this input/output table?
Input14374263
Output21444970
  1. add 5
  2. add 7
  3. add 23
  4. add 35
 
6. 
What is the rule for this input/output table?
Input51586487
Output46535982
  1. subtract 3
  2. subtract 4
  3. subtract 5
  4. subtract 6
7. 
What is the rule for this input/output table?
Input22384057
Output4202239
  1. add 16
  2. add 18
  3. subtract 16
  4. subtract 18
 
8. 
What is the rule for this input/output table?
Input16275264
Output31426779
  1. add 11
  2. add 15
  3. subtract 11
  4. subtract 15
9. 
What is the rule for this input/output table? Explain how you found the rule.
InputOutput
1231
2544
3857
7190




 
10. 
Reggie says the rule for the input/output table is subtract 8. Is Reggie's rule correct? Explain how you know.
InputOutput
4236
5751
7064
8579




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