1.   Estimate the difference to the nearest ten. 298 − 108
    A. 180 B. 170
    C. 200 D. 190
    Hint

  2.   Estimate the difference to the nearest ten. 769 − 335
    A. 450 B. 430
    C. 440 D. 420
    Hint

  3.   Estimate the difference to the nearest ten. 143 − 82
    A. 80 B. 60
    C. 0 D. 40
    Hint

  4.   Estimate the difference to the nearest hundred. 298 − 108
    A. 400 B. 100
    C. 200 D. 90
    Hint

  5.   Which is a better estimate for 696 − 187?
    A. 696 − 187 is 509 which is closer to 510 than 500 so the nearest ten is better. B. 696 − 187 is 501 which is closer to 510 than 500 so the nearest ten is better.
    C. 696 − 187 is 501 which is closer to 500 than 510 so the nearest hundred is better. D. 696 − 187 is 509 which is closer to 510 than 500 so the nearest hundred is better.
    Hint