1.   Estimate. Round to the tens place.

$54 + $21

    A. $75 + $25 = $100 B. $60 + $30 = $90
    C. $50 + $20 = $70 D. $50 + $30 = $80
    Hint

  2.   Find the sum.

    A. 71 B. 17
    C. 82 D. 81
    Hint

  3.   Find the number that completes the number sentence. Then identify the property or rule.

(21 + 13) + 56 = 21 + (∅ + 56)

    A. 13; Associative Property of Addition
    B. 21; Identity Property of Addition
    C. 35; Subtraction Rule
    D. 13; Commutative Property of Addition
    Hint

  4.   When you subtract 0 from any number, the result is the number. Which addition rule is similar?
    A. Associative Property of Addition B. Identity Property of Addition
    C. Commutative Property of Addition D. Subtraction Rule
    Hint

  5.   Estimate. Round to the indicated place value.

221 + 32; tens

    A. 230 + 30 = 260 B. 220 + 30 = 250
    C. 200 + 30 = 230 D. 220 + 40 = 260
    Hint

  6.   Estimate. Round to the indicated place value.

$42 + $31; tens

    A. $40 + $30 = $70 B. $50 + $30 = $80
    C. $40 + $35 = $75 D. $50 + $40 = $90
    Hint

  7.   Find the sum.

    A. 5,861 B. 6,071
    C. 6,861 D. 5,971
    Hint

  8.   Find the sum.

    A. 7,154 B. 8,514
    C. 6,514 D. 7,514
    Hint

  9.   Find 932 − 612.
    A. 290 B. 320
    C. 220 D. 310
    Hint

  10.   Find the difference.

    A. 271 B. 211
    C. 201 D. 473
    Hint

  11.   Look at the problem below. Where would you start regrouping to find the difference?

    A. ones place B. hundreds place
    C. tens place D. thousands place
    Hint

  12.   Subtract.

    A. 2,593 B. 2,583
    C. 2,483 D. 2,493
    Hint