From Molly: Hi my name is molly, and I have a question I can't answer and need your help. I am a student. This is the qustion:
Try to replace the blanks below with + or - to make the statement correct
1_2_3_4_5_6_7_8_9 = 1 Answered by Claude Tardif.
From Justin: 1. To find out about how much, you can-------------
2. The --------- ---------states that the sum is the same no matter who you group the addends. Answered by Stephen La Rocque.