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Thực hiện phép tính : a) `2020 + ( - 2021 )` b) `( - 2020 ) + ( - 2021 ) ` c) ` ( - 2020 ) + 2021 ` d) `234 - 117 + ( - 100 ) + ( 234 ) ` e) ` ( - 927 ) + 1421 + 930 + ( - 1421 ) `
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Xlll. Write complete sentences using the cuse given 1. lt / be / a pleasure / to watch / live show / of / rock and roll / television ________________________________________________________________________ 2. Viet Nam / have / more than100 kinds of che / from the North / to the South _____________________________________________________________________________ 3. His hobbies / be / collect postcards / and / take photographs _______________________________________________________________ 4.Cambridge / regard / as / second oldest university / the UK. ______________________________________________________________ 5. Students of the University of Oxford / teach / by / famous lecturers _____________________________________________________________________ 6. Dong Ho paintings / usually / buy / and / enjoy / Tet ________________________________________________________ 7. How many / meals / people in your area / often / have / a day ? _____________________________________________________________________ 8.The broth / pho bo / make / by / stew / bones of cows / a long time ____________________________________________________________________

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