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5
6
7
8
9
100
4-1
3
100
7-4=
3
100
5+5=
10
100
2+4=
5
100
7+8=
15
500
70+80=
150
500
100+500=
600
500
200+100=
300
500
200+200=
400
500
100+200=
300