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Here's some fun for you!

Make a "blanks pyramid" on a piece of paper (like I have below) and fill in the answers for this:

row 1:  ( 0  0 )  ...  row 2:  ( 1  0 )  ( 1  1 )  ...  row 3:  ( 2  0 )  ( 2  1 )  ( 2  2 )  ...  row 4:  ( 3  0 )  ( 3  1 )  ( 3  2 )  ( 3  3 )  ...  row 5:  ( 4  0 )  ( 4  1 )  ( 4  2 ) ( 4  3 )  ( 4  4 )  ...  row 6:  ( 5  0 )  ( 5  1 )  ( 5  2 )  ( 5  3 )  ( 5  4 )  ( 5  5 )

 

 

row 1:  __  ...  row 2:  __  __  ...  row 3:  __ __ __   ...  row 4: __ __ __ __  ...  row 5:  __  __  __  __  __  ...  row 6:  __  __  __  __  __  __