Show:
+ 1
-1
+10
-10
-100
100
790
What is 789 +1?
100
699
What is 700 -1?
100
439
What is 329 + 10?
100
390
What is 400 - 10?
200
150
What is 149 + 1?
200
199
What is 200 -1?
200
789
What is 779 + 10?
200
590
What is 600 - 10?
200
598
What is 698 - 100?
300
680
What is 679+1?
300
399
What is 400 - 1?
300
600
What is 590 + 10?
300
889
What is 899 - 10?
400
890
What is 889 +1?
400
700
What is 699 - 1?
400
800
What is 790 + 10?
400
397
What is 407 - 10?
400
679
What is 779 - 100?
500
499
What is 500 - 1?
500
409
What is 399 + 10?
500
299
What is 309?
500
900
What is 1,000 - 100?