1. Zher4 shi4 yin2hang2
2. Ta1 zai4 yin2hang2, ta1 xiang3 huan4(换)/huan2(还) qian2
3.(I cant understand this one.)
4.Correct
5.Di4tie3 zai4 nar3
6.Wu3 cheng2/cheng2yi3(乘以) san1 shi4 duo1 shao3
7.Shi2 er4 ……
8.Wo3 mu2qin xi2huan1 wo3 de mei4mei
9.Wo3 xiang3 ni3.( Actually, this sentence is usually said as " Wo3 xiang2 ni3")