additions
two plus six equal to
8
four minus two equal to
two
seventeen
17
seven
7
ten plus ten
eleven minus ten equal to
1
nineteen
19
nine
9
nine plus six equal to
15
seventeen minus six equal to
11
twelve
12
five
5
seven plus eleven equal to
18
sixteen minus six equal to
10
eighteen
18
ten
10
twelve plus eight equal to
20
nineteen minus three equal to
16
twenty
20
three
3