
Name: Jessica
Who is asking: Student
Level: Middle
Question:
F= 3 + 3 WHAT IS F?????
Hi Jessica,
Think of this as motion along the number. F starts at 0 and moves according to the expression, with + meaning you move to the right and  meaning you move to the left.
For example
F = 5  2
says start at 0, move 5 units to the right and then 2 units to the left. You end up at position 3 and hence
F = 5  2 = 3
Similarly
F = 3 + 4
says start at 0, move 3 units to the left and then 4 units to the right. You end up at position 1 and hence
F = 3 + 4 = 1
Now find
F = 3 + 3
Cheers,
Penny
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