30+60=               7+20=                 80-40=                21+8=                

5+32=                 54-3=                  32+40=               3+55=  

75-20=                49-2=                  39-6=                  100-70= 

86-3=                  7+82=                 54-1=                  77-7=   

20+53=               68-2=                  34+4=                 70+9=

□○□＝□（道）

答：还有（    ）道没做。

90-2075-5                      74-3100-20                           30+4084-1

48-38+21                       35+490-60                            46+380-50

80-4042+7                         6+5257-6                               94-260+30

7米        70厘米                 70米             90厘米                 90米             100厘米 

＞＞＞＞＞