题目

用你认为最简便的方法计算。①45×14×2②36×15+64×15③125×18④1200÷24÷5⑤55×104⑥75×40×6 答案：①45×14×2 =45×2×14 =90×14 =1260 ②36×15+64×15 =（36＋64）×15 =100×15 =1500 ③125×18 =125×（10＋8） =125×10＋125×8 =1250＋1000 =2250 ④1200÷24÷5 =1200÷（24×5） =1200÷120 =10 ⑤55×104 =55×（100＋4） =55×100＋55×4 =5500＋220 =5720 ⑥75×40×6 =3000×6 =18000Mr. Brad wants to see a film. After lunch, he goes to a cinema, buys a ticket(票) and goes in. But after two or three minutes he comes out again and buys a second ticket and then walks in again.After a few minutes he comes out again and buys a third ticket. Two or three minutes after that, he comes out a third time and asks for another ticket. But the girl says to him, “Why are you buying all these tickets? Are you meeting your friends in the cinema all the time?” “No, I’m not doing that.” Mr. Brad says, “But a big woman always stops me at the gate of the cinema and she tears(撕) all my tickets.” The girl has a good laugh and says, “One ticket is enough. She is on duty.”1.After lunch, Mr. Brad __________.A. goes shopping B. goes fishingC. goes to the supermarket D. goes to a cinema2.Mr. Brad _____ goes to the cinema after lunch.A. himself B. and his wife C. and his friends D. a girl3.Mr. Brad comes out of the cinema ______.A. once B. twiceC. three times D. four times4. Mr. Brad buys _____ tickets altogether (一共).A. two B. threeC. four D. five5.The woman tears his tickets because she _____.A. likes to do thatB. doesn’t like Mr. BradC. thinks they’re false(假的) ticketsD. is checking up(检查) all the tickets