11×22+0.22×3300+330×4.4
=11×22+22×33+33×44
=11×22+22×33+33×2×22
=（11+33+66）×22
=110×22
=2420
或:
11×22+0.22×3300+330×4.4
=11×22+22×33+33×44
=（11+33）×22+33×44
=44×22+33×44
=44×（22+33）
=44×55
=2420
.把小数变成正数，灵活运用学到的知识，难题也能轻易攻克
原式
=11x22+0.22x3300+330x4.4
=11x22+22x33+33x44
=11x22+22x33+33x2x22
=11x22+22x33+66x22
=(11+33+66)x22
=110x22
=100x22+10x22
=2200+220
=2420
或者
=11x22+22x33+33x44
=(11+33)x22+33x44
=44x22+33x44
=44x(22+33)
=44x55
=44x50+44x5
=2200+220
=2420
1100×0.22＋0.22×3300＋6600×0.22
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