问题 口算题

口算。

18+25=                                 7000-5000=                           20÷4=        

4×8+8=                               63-18=                                  1400-800=      

18÷2=                                 1200+800=                            63÷7=      

320+400=                              90-46=                                 30-5=

答案

43;2000;5;40;45;600;9;2000;9;720;44;25

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