tính tổng A=1*2+2*3+3*4+....+18*20

Các câu hỏi liên quan

Write the questions and answers about the activities after school with the cue words: 1/ you/ play badminton _______________________________________________? _________________________________________________________________ 2/ Nam/ study in the library ___________________________________________? __________________________________________________________________ 3/Tuan and Phong / play video games _____________________________________? ___________________________________________________________________ 4/ Your brother/ Watch videos ___________________________________________? ___________________________________________________________________ 5/ they/ go to the stamp collector’s club _____________________________________? ____________________________________________________________________ 6/ your sister/ learn to play the piano ________________________________________? ____________________________________________________________________ 7/ your children/ go swimming ____________________________________________? _____________________________________________________________________ 8/ Mai/ skip with her friends ______________________________________________? _____________________________________________________________________ 9/ your friends/ help their mother with the housework _____________________________________________________________________? _____________________________________________________________________ 10/ your teachers/ play blindman’s bluff _____________________________________________________________________? _____________________________________________________________________ VII. Put the words into the correct sentences: 1/ the/ never/ she/ does/ housework // ____________________________________________ . 2/ always/ church/he/ to/ goes/Sundays/ on // ______________________________________. 3/ they/ free/ usually/ are/ the weekend/ on // ______________________________________. 4/ marbles/ boys/ often/ the/ recess/ play/ at/ do?// ___________________________________? 5/ library/ I/ in/ study/ school/ after/ the/ sometimes/ _________________________________. 6/ Phong/ interested/ is/ in/ always/ music / _________________________________________. 7/ never/ my/ can/ meal/a/ cook/ good/ sister / _______________________________________. 8/ fond/ she/ of/ is/ piano/ playing // _______________________________________________. 9/ often/ to/ recess/ school cafeteria/ we/ at/ go/ the// _________________________________________________________________________. 10/ like/ to/would/ you/ to us/ movies/ go/ the/ with?// __________________________________________________________________________? VIII. Read the paragraph. Then answer the questions: The Vietnamese students take part in different after-school activities. Some students play sports. They often play soccer, table tennis and badminton. Sometimes, they go swimming in the swimming pool. Some students like music, drama and movies. They often practice playing musical instuments in the school music room. They join in the school theater group and usually rehearse plays. Some are members of the stamp collector’s club. They often get together and talk about their stamps. A few students stay at home and play video games or computer games. Most of them enjoy their activities after school hours. 1/ Which sports do some students often play? __________________________________________________________ 2/ How often do they go swimming? __________________________________________________________ 3/ Where do some stydents often practice playing musical instruments? __________________________________________________________ 4/ How often do tey rehearse plays? __________________________________________________________ 5/ What do the members of stamps collector’s club often do? __________________________________________________________ 6/ Do Vietnamese students enjoy their activities? __________________________________________________________