Addition
Rounding to the Nearest Ten
Rounding to the Nearest Hundred
Subtraction
Vocabulary
100

56 + 64 = ?

120

100

Round 28 to the nearest 10.

30

100

Round 94 to the nearest 100.

100

100

48 - 19 = ?

29

100

What is a sum?

The answer to an addition problem.

200

145 + 238 = ?

383

200

Round 65 to the nearest 10.

70

200

Round 298 to the nearest 100.

300

200

172 - 148 = ?

24

200

What are addends?

The numbers that you add in an addition problem.

300

520 + 297 = ?

817

300

Round 173 to the nearest 10.

170

300

Round 824 to the nearest 100.

800

300

450 - 365 = ?

85

300

Which property does this math equation show?          34 + 56 = 56 + 34

Commutative Property of Addition

400

376 + 274 = ?

650

400

Round 765 to the nearest 10.

770

400

Round 749 to the nearest 100.

700

400

712 - 534 = ?

178

400

Which property does this math equation show?             4 + (9 + 3) = (4 + 9) = 3

Associative Property of Addition

500

876 + 438 = ?

1,314

500

Round 503 to the nearest 10.

500

500

Round 651 to the nearest 100.

700

500

637 - 459 = ?

178

500

What do you do when you take a multiple of 10 or 100 that is nearest the number?

Round

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