3 Digit Addition
4 Digit Addition
5 Digit Addition
6 Digit Addition
Estimate Sums
100

  456 + 345 =

810

100

3,824 + 8,123 = 

11,947

100

46,019 + 12,468 = 

58,487

100

608,510 + 272,341 =

880,851

100

389 + 218 =

400 + 200 = 600

200

124 + 213 =

124 + 213 = 337

200

4,158 + 2,487 =

6,645

200

33,678 + 51,432 =

85,110

200

713,673 + 203,499 =

917,172

200

458 + 487 =

500 + 500 = 1,000

300

556 + 382 = 

938

300

3,476 + 2,788 =

6,264

300

15,648 + 31,425 =

47,073

300

246,782 + 412,645 =

659,427

300

6,782 + 4,645 =

7,000 + 5,000 = 12,000

400

178 + 824 = 

1002

400

6,720 + 4,308 =

11,028

400

87,884 + 67,804 =

155,688

400

239,673 + 210,344 =


450,017

400

43,562 + 23,348 =

40,000 + 20,000 = 60,000

500

837 + 158 + 

995

500

3,458 + 4,673 =

8,131

500

64,961 + 17,321 =

82,282

500

100,654 + 100,377 =

201,022

500

135,678 + 108,780=

100,000 + 100,000 = 200,000