+
6+24=
30
9-6
3
How many 10s in 59
5
17_____13
>
14+20=
34
8-2
6
How many 10s in 97
9
23____33
<
24+10=
34
12-7
how many ones in 34
4
36____36
=
17+3=
20
15-11
4
How many ones in 23
3
38____28
>
3+26=
29
23-3
20
Which numbers have 4 groups of 10?
44 24 49 94
44 49
3tens__30
=