Rounding to the nearest tens
33
30
544
500
961
1,000
17+3
20
31-7
24
84
80
561
600
2,174
2,000
50+11
61
50-18
32
126
130
536
500
3,534
4,000
1,115+2,200
3,315
160-65
95
647
650
892
900
7,359
7,000
3,500+2,092
5,592
700-428
272
1257
1,260
994
1,000
9517
10,000
9,925+3,876
13,801
9567-4237
5330