addition 3 digit
100+900
1,000
555-55
500
9,000+9,000
9009
9,000-2,000
7,000
100 x 1
100
900+267
1,167
100-50
40
1,000+2,000
3,000
4,000-2,000
2,000
999-890
109
300+300
600
200-20
180
2,000+9,000
11000
9,999-4,895
5,104
9,589-1,000
8,589
400+100
500
300-40
260
5,000+1,096
6096
4,489-1,569
2,920
9,000 x 2
18
134+589
721
400-500
100
9000
9000
9000+1000
10,00
9,000-1,000
8,000
9,000 x 78
702