SOLUTION: How to teach more than one missing number between two given numbers(30 - - 120) to 2nd grader? (problem is similar to Question 104322: 21 - - 63) Thanks, Venkata Madduri

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Question 668032: How to teach more than one missing number between two given numbers(30 - - 120) to 2nd grader? (problem is similar to Question 104322: 21 - - 63)
Thanks,
Venkata Madduri
Answer by CubeyThePenguin(3113) About Me  (Show Source):
You can put this solution on YOUR website!
This is a repeat problem.

30, ___, ___, 120
interval: (120 - 30)/3 = 30
in the blanks: 30, 60, 90, 120