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Addition
Subtraction
Estimating Sums
Estimating Differences
Properties
100

589 + 672

1,261

100

598 - 167

431

100

Round each number in the problem to the nearest hundred and solve.

189 + 111

300

100

Round each number to the nearest ten and solve.

142 - 68

70

100
Which property of addition makes this problem true?


75 + 0 = 75



identity property of zero

200

600 + 259

859

200

987 - 693

294

200

Round each number to the nearest thousand and solve.

4,628 + 3,216

8,000

200

Round each number to the nearest hundred and solve.

865 - 423

500

200

Which property of addition makes this problem true?

(450 + 75) + 50 = (50 + 75) + 450

associative property of addition

300

1,629 + 3,854

5,843

300

1,929 - 684

1,245

300

Round each number to the nearest thousand and solve.

10,198 + 21,567

32,000

300

Round each number to the nearest thousand and solve.

9,145 - 7,682

1,000

300

What property of addition makes this problem true?

780 + 90 = 90 + 780

commutative property of addition

400

4,000 + 9,638

13,638

400

32,589 - 27,854

4,735

400

Round each number to the nearest ten thousand and solve.

25,678 + 12,689

39,000

400

Round each number to the nearest ten thousand and solve.

86,245 - 54,672

40,000

400

Make this problem true.

4500 + (750 + 50) = (750 + 4500) + ____

50

500

515,895 + 100,639

616,534

500

659,258 - 125,674

533,584

500

Round each number to the nearest hundred thousand and solve.

516,245 + 112,410

600,000

500

Round each number to the nearest hundred thousand and solve.

925,450 - 678,435

200,000

500

Make this problem true.

1,500 + 500 = ____ + 1500

500