1: 明明 200×25%=50
甜甜 200×20%=40
苗苗 200-50-40=110
2: 5×6+2×3
=36
3: ① 240×﹙1+45%﹚
=240×1.45
=348
② 348÷﹙1+45%﹚
=348÷1.45
=240