1st Add / Subtract
30 - 10
30 - 10 = 20
10 + 17
27
217 + 183
217 + 183 = 400
53 - 22
53 - 22 = 31
58 - 29
58 - 29 = 28
20 + 30
20 + 30 = 50
13 + 17
30
430 + 380
430 + 380 = 810
80 - 43
80 - 43= 37
197 - 79
197 - 79 = 118
24 + 14
24 + 14 = 38
12 + 18
30
402 + 519
921
153 - 38
153 - 38 = 115
580 - 320
580 - 320=260
46 - 8
46 - 8 = 38
19 + 14
33
279 + 340
619
115 - 80
115 - 80 = 35
723 - 584
723 - 584 = 139
24 - 9
24 - 9 = 15
15 + 24
39
159 + 432
159 + 432 = 591
522 - 139
383
362 - 149
362 - 149 = 213