subtracting
900-350
550
5+1
6
1x1
1
1 divided by 1
1
-1+1
0
500-230
270
20+40
60
2x5
10
19 divided 2
9
200+568
768
954-400
554
150+150
300
10x4
40
36 divided 6
6
-500+200
-300
1250-570
680
700+700
1400
20x5
100
320 divided by 4
80
500-34
-466
5054-3067
1987
900+900
1800
30x6
180
5000 divided by 10
500
-1098+531
-567