5x5
=(2+3)x(2+3)
=(1+1+3)x(1+1+3)
=1+1+3x1x1+1+3x1
=1+1+3+1+1+3
=5+5
=10
5×5
=(2+3)×(2+3)
=(½÷4+⅓÷9)×(½÷4+⅓÷9)
=(½÷4)+3²×2+(3²-3-3)
=4+(9×2(²-³))+(3²-3×2)
=25