Count forwards and backwards by tens and hundreds on and off the decade, eg 1220, 1230, 1240, ... (on the decade); 423, 323, 223, ... (off the decade)

1.		10 less, 10 more than 490
2.		100 less, 100 more than 873
3.		Which number is 10 more than 989?
4.		Which number is 10 less than 724?
5.		Which number is 100 more than 456?
6.		Which number is 100 less than 388?
7.		10 less, 10 more than 150
8.		10 less, 10 more than 183
9.		10 less, 10 more than 418
10.		10 less, 10 more than 106
11.		10 less, 10 more than 204
12.		100 less, 100 more than 403
13.		10 less, 10 more than 150
14.		10 less, 10 more than 290
15.		10 less, 10 more than 500
16.		10 less, 10 more than 620
17.		10 less, 10 more than 880
18.		10 less, 10 more than 508
19.		100 less, 100 more than 475
20.		10 less, 100 more than500
21.		100 less, 10 more than 358
22.		100 less, 100 more than 458
23.		100 less, 100 more than 765
24.		100 less, 100 more than 342
25.		100 less, 100 more than 897
26.		100 less, 100 more than 453
27.		100 less, 100 more than 213
28.		10 less, 10 more than 5990
29.		100 less, 100 more than 4900
30.		10 less, 100 more than 5302
31.		10 less, 100 more than 4508
32.		100 less, 10 more than 6577
33.		100 less, 100 more than 7323