1.   Estimate the sum to the nearest ten. 372 + 243
    A. 640 B. 620
    C. 630 D. 610
    Hint

  2.   Estimate the sum to the nearest ten. 773 + 184
    A. 950 B. 930
    C. 960 D. 940
    Hint

  3.   Estimate the sum to the nearest hundred. 486 + 438
    A. 700 B. 900
    C. 800 D. 600
    Hint

  4.   Estimate the sum to the nearest hundred. 743 + 184
    A. 600 B. 900
    C. 700 D. 800
    Hint

  5.   Which is a better estimate for 626 + 187?
    A. 626 + 187 is 803 which is closer to 800 than 820 so the nearest hundred is better. B. 626 + 187 is 813 which is closer to 800 than 820 so the nearest hundred is better.
    C. 626 + 187 is 813 which is closer to 820 than 800 so the nearest ten is better. D. 626 + 187 is 803 which is closer to 820 than 800 so the nearest ten is better.
    Hint