Homework Help Forum: 3rd grade

Posted by rose on Wednesday, September 2, 2009 at 10:59pm.

what is a set of related addition and subtraction number sentences useing the same numbers

• 3rd grade - Ms. Sue, Wednesday, September 2, 2009 at 11:00pm

  2 + 5 = 7 7 - 2 = 5 10 + 4 = 14 14 - 4 = 10

  
  

• 3rd grade - smart, Thursday, September 10, 2009 at 5:08pm

  15 - 7 = 8 15 - 8 = 7 8 + 7 = 15 7 + 8 = 15

  
  

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