2+2

(a)  

4+4

(a)  

55+55

(a)  

45+45=

(a)  

85+85=

(a)  

65+65=

(a)  

35+35=

(a)  

25+25=

(a)  

15+15=

(a)  

95+95=

(a)  

100+100=

(a)  

105+95=

(a)  

200+100=

(a)  

205+95

(a)  

300+100=

(a)  

250+250=

(a)  

350+50

(a)  

150+150=

(a)  

450+50=

(a)  

550+50=

(a)  

650+50

(a)  

750+50=

(a)  

850+50=

(a)  

950+50=

(a)