已知A=0.96,B=0.3,则A÷B=( )
5.1+8.25+4.9+1.75
47+= 147-=
189+188+187+186+185+184+183 =×
①1000-547
②100000-85426
③11111111110000000000-1111111111
④78053000000-78053