addition
what is 5+5=
10
what is 10-5=
5
what is 1000+1000=
2000
what is 10+10=
20
what is 25-20=
5
what is 1500+50=
1550
what is 12+12=
24
what is 40+30=
70
what is 10000+5000=
15000
what is 50+50=
100
what is 150-100=
250
what is 300+200=
500