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Make a ten
Doubles plus one
100
8+3=
11
100
8+9=
17
200
9+5=
14
200
4+5=
9
300
5+7=
12
300
6+7=
13
400
6+6=
12
400
7+8=
15
500
5+8=
13
500
9+8=
17