试题:
比一比,看谁算得又对又快。 
53+40=                        62+7=                    35+50=                  28-6=    
72-4 =                          44 -3=                    95-8=                    49 - 40 =    
24+30+5=                    86+6-50=                62-3+8=                 79-50-2=    
20+60-6=                     30+23 - 9=              89-50+9=               98+2-80 =

答案:

我来补答
93;69;85;22;68;41;87;9;
59;42;67;27;74;44;48;20
 
 
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