Show:
Rounding to the Nearest Ten
Rounding to the Nearest Hundred
Rounding to the Nearest Thousand
Addition then Rounding
Subtraction then Rounding
100
53
50
100
678
700
100
1675
2000
100

Add then round to the nearest 10. 

56 + 35 =

91 rounds to 90

100

Subtract then round the difference to the nearest 10.

38 - 5 =

33 rounds to 30

200
88
90
200
894
900
200
4342
4000
200

Add then round to the nearest 10.

39 + 24 =

63 rounds to 60

200

Subtract then round the difference to the nearest 10.

167 - 25 =

142 rounds to 140

300
11
10
300
204
200
300
7569
8000
300

Add then round to the nearest 100.

835 + 27 =

862 rounds to 900

300

Subtract then round the difference to the nearest 10.

178 - 69 =

109 rounds to 110

400
320
320
400
910
900
400
2745
3000
400

Add and round the sum to the nearest 100. 

278 + 384 =

662 rounds to 700

400

Subtract then round the difference to the nearest 100. 

582 - 195 =

387 rounds to 400

500
746
750
500
433
400
500
1326
1000
500

Add the round the sum to the nearest 100.

313 + 213 =

526 rounds to 500

500

Subtract then round the difference to the nearest 100. 

721 - 489 =

232 rounds to 200