A. bank B. hotel C. hospital D. cinema E. worker F. teacher
⑴ ____ ⑵ ____
⑶ ____ ⑷ ____
⑸ ____ ⑹ ____
38+45=
10﹣1.05=
45× 49 =
67 ÷80%=
3﹣2÷5=
7π=
14 + 15 =
如图,在正方形ABCD中,E是BC的中点,△DEF的面积等于2,则此正方形ABCD的面积等于 ( )