từ 1 - 9 có 9 chữ số

từ 10 -99 có 180 chữ số

từ 100 - 240 có 423 chữ số

ta phải viết số chữ số là :

180 + 9 + 423 = 612 ( chữ số )

ĐS : 612 chữ số

Choose the word in the parentheses to complete the following sentences:
1.Each of the girls ...................many books. (has / have/ having/ to have )
2.I love this painting of an old man. He has such a beautiful .................. smile.
( childhood/ childish/ childless/ childlike )
3.I never wear yellow because It doesn’t ................. me. (match/ fit/ like/ suit )
4.Always ..............honest in whatever you do. (to be/ be/ being/ are )
5.If we use her house, we must pay the ................... . (fee/ fare/ rent/ tip )
6.A prisoner ........................ this morning. (is hanged/ is hung/ was hanged/ was hung )
7.Scientists are doing their research work in the ................(museum/office/library/laboratory)
8.The Browns have moved into a huge .................(two-storey house/house of two storey/
two-storeys house/ house two storey )
9.In pain as a result of the fall, he ...............slowly home.(stepped/ wound/limped/sped)
10.I think he’s unwell, he was complaining ...............a headache this morning. (at/ of/ from / against )