One, draw up following the smooth number of squares of each number.

1^{2}( ) 6^{2}( )

2, extend an exercise:

Will below the letter in calculating type is replaced with the number, make calculate type to hold water.

＝ of A of of of of F of of E of of D of of C of of A B ( ) B ＝ ( ) C ＝ () D ＝ ( )

__F of of of of of of ＊ __E ＝ ( ) F ＝ ( ) G ＝ ( )

of of of of of of of of of of of of of of of of of of G of of G of of G of of G of of G G

3, solve equation.

62.5 ＝ of X ＋ 45 ＊ of of of of of of of of of of of 114.2 X ＝ 135

35.5/X ＝ 5