Addition
the sum of 30+12
what is 42
the difference of 40-20
what is 20
this is a 6 sided polygon
what is a hexigon
6,11,16,x,x,x
what is 21, 26, 31
100+10+1
what is 111
the sum of 50+22
what is 72
the difference of 90-38
what is 52
this is a 8 sided polygon
what is a octogon
3,5,7,x,x,x
what is 9,11,13
10+10+10+10+5+5+5+5
what is 60
the sum of 55+28
What is 83
the difference of 153-123
what is 30
this is a 5 sided polygon
what is a pentagon
16,21,26,31,x,41,x,51,x
what is 36,46,56
200+20+5
what is 225
the sum of 45+53
what is 98
the difference of 248-131
what is 177
this is a 0 sided shape
what is a circle
445,545,645,x,x,x,
what is 745,845,945
1000+500+40+3
what is 1543
the sum of 105+65
what is 170
the difference of 556-239
what is 317
this is a 9 sided polygon
what is a nonigon
1325 1330 1335 x, x, x
what is 1340,1345,1350
5000+400+70+9
what is 5479