2.2x3.3+3.3x4.4+4.4x5.5+5.5x6.6=

问题描述:

2.2x3.3+3.3x4.4+4.4x5.5+5.5x6.6=

1.1X1.1X(2X3+3X4+4X5+5X6)=1.21X68=82.28(4.16x84-2.08x54-0.15x832)\(0.3)的平方