Count By...
20+3=
23
9
Fill in the missing numbers: 12,....,....,....,16,....,...
12,13,14,15,16,17,18
7+2=
9
One more than 39
40
Fill in the missing number: 40,41,...,....,44,...,...
40,41,42,43,44,45,46
One less than 26
25
Count in 10s; 20,....,40,....,....,.....,80
30,40,50,60,70
34, 36, 38
30-4=
One more than 35
36
Fill in the missing number: 39,40,...,...,...,....
41,42,43,44
one more than 42
43
14-7
7
Fill in the missing number: 12,...,14,...,...,17
12,13,14,15,16,17