Written Form
Estimate the Sum
Estimate the Difference
Tacking on Zeros
Front End Rounding
100
5602
What is five thousand six hundred-two?
100
103 + 299
What is 400?
100
799 -199
What is 1000?
100
25 x 10
What is 250?
100
30 243
What is 30 000?
200
10 012
What is ten thousand-twelve?
200
721 + 106
What is 800?
200
982 - 204
What is 800?
200
372 x 10
What is 3720?
200
55 233
What is 56 000?
300
502 875
What is five hundred two thousand eight hundred seventy-five?
300
2989 + 7025
What is 10 000?
300
6785 - 1834
What is 5000?
300
571 x 100
What is 57 100?
300
82 998
What is 83 000?
400
400 016
What is four hundred thousand sixteen?
400
11 021 + 27 899
What is 31 000?
400
37 299 - 11 001
What is 26 000?
400
4 x 60
What is 240?
400
21 321
What is 20 000?
500
5 460 999
What is five million four hundred sixty thousand nine hundred ninety-nine?
500
501 111 + 399 999
What is 900 000?
500
998 998 - 201 429
What is 800 000?
500
9 x 400
What is 3600?
500
999 999
What is 1 000 000?
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