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18 + ...... = 88
70
18 + ...... = 25
7
350 + ...... = 798
448
950 + ...... = 1,800
850
............. + 2,222 = 3,209
987
............. + 780 = 835
55
............. + 690 = 4,200
3,810
............. + 45 = 57
12
............. - 500 = 7,500
8,000
............. - 66 = 99
33
............. - 735 = 600
1,335
............. - 50 = 450
500
70 - ...... = 25
45
30 - ...... = 25
5
450 - ...... = 99
351
69 - ...... = 39
30
