6978-2124+3144=

(a)  

1236+7521-4416=

(a)  

82153+4542-63543=

(a)  

37296-13163+13031=

(a)  

67+33-82=

(a)  

52+57-89=

(a)  

353+679-79=

(a)  

7500-2671+1329=

(a)  

10000-482+682=

(a)  

10÷5×9=

(a)  

105×27÷3=

(a)  

80×24÷10=

(a)  

657×7÷14=

(a)  

29800÷25×4=

(a)