Show:
Addition
Subtraction
pattern
skip number
skip by 10's
100
14
6+8=__
100
8
14-6=__
100
3
2,3,1,2,_,1
100
2,5
1,_,3,4,_
100
20,40
10,_,30,_
200
7
4+3=__
200
6
8-2=__
200
2
1,2,3,4,1,2,3,4,1,_,3,4
200
3,4
2,_,_,5
200
20,50
10,_,30,40,_
300
13
7+6=__
300
3
4-1=__
300
v
s,t,v,u,u,v,t,s,s,t,_,u
300
7,9
5,6,_,8,_,10
300
40,50
30,_,_,60,70
400
15
7+8=__
400
5
12-7=__
400
www
b,w,bb,www,b,w,bb,_
400
2,3
1,_,_4,5
400
50
40,_,60
500
put two numbers together
what is addition
500
take away from a big number
what is subtraction
500
r
t,s,r,t,r,t,s,_,t
500
19,22
16,17,18,_,20,21,_,23
500
30,40
10,20,_,_,50