Doubles
2 + 2
4
3+2
5
what has 5 tens and 3 ones
53
next ten from 15
20
last ten from 20
10
5+5
10
7+6
13
what has 8 tens and 6 ones
86
next ten from 35
40
last ten from 45
30
7+7
14
6+5
11
what has 3 tens and 5 ones
35
next ten from 78
80
last ten from 72
60
10+10
20
9+8
17
what has 7 tens and 9 ones
79
next ten from 53
60
last ten from 87
70
12+12
24
12+11
23
what has 0 tens and 7 ones
7
next ten from 90
100
last ten from 43
30